diff --git a/googleapis/api/annotations/client.pb.go b/googleapis/api/annotations/client.pb.go
index 7aca96a..3832df0 100644
--- a/googleapis/api/annotations/client.pb.go
+++ b/googleapis/api/annotations/client.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/annotations/field_behavior.pb.go b/googleapis/api/annotations/field_behavior.pb.go
index f534939..0038b20 100644
--- a/googleapis/api/annotations/field_behavior.pb.go
+++ b/googleapis/api/annotations/field_behavior.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/annotations/http.pb.go b/googleapis/api/annotations/http.pb.go
index dfb43f7..955bc56 100644
--- a/googleapis/api/annotations/http.pb.go
+++ b/googleapis/api/annotations/http.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/annotations/resource.pb.go b/googleapis/api/annotations/resource.pb.go
index 140f2af..ff6147f 100644
--- a/googleapis/api/annotations/resource.pb.go
+++ b/googleapis/api/annotations/resource.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -262,10 +261,14 @@
 	//       };
 	//     }
 	History ResourceDescriptor_History `protobuf:"varint,4,opt,name=history,proto3,enum=google.api.ResourceDescriptor_History" json:"history,omitempty"`
-	// The plural name used in the resource name, such as 'projects' for
-	// the name of 'projects/{project}'. It is the same concept of the `plural`
-	// field in k8s CRD spec
+	// The plural name used in the resource name and permission names, such as
+	// 'projects' for the resource name of 'projects/{project}' and the permission
+	// name of 'cloudresourcemanager.googleapis.com/projects.get'. It is the same
+	// concept of the `plural` field in k8s CRD spec
 	// https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/
+	//
+	// Note: The plural form is required even for singleton resources. See
+	// https://aip.dev/156
 	Plural string `protobuf:"bytes,5,opt,name=plural,proto3" json:"plural,omitempty"`
 	// The same concept of the `singular` field in k8s CRD spec
 	// https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/
@@ -363,6 +366,17 @@
 	//         type: "pubsub.googleapis.com/Topic"
 	//       }];
 	//     }
+	//
+	// Occasionally, a field may reference an arbitrary resource. In this case,
+	// APIs use the special value * in their resource reference.
+	//
+	// Example:
+	//
+	//     message GetIamPolicyRequest {
+	//       string resource = 2 [(google.api.resource_reference) = {
+	//         type: "*"
+	//       }];
+	//     }
 	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
 	// The resource type of a child collection that the annotated field
 	// references. This is useful for annotating the `parent` field that
diff --git a/googleapis/api/configchange/config_change.pb.go b/googleapis/api/configchange/config_change.pb.go
index 82fd791..e6eaf72 100644
--- a/googleapis/api/configchange/config_change.pb.go
+++ b/googleapis/api/configchange/config_change.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/distribution/distribution.pb.go b/googleapis/api/distribution/distribution.pb.go
index a4cb3ea..5df93cc 100644
--- a/googleapis/api/distribution/distribution.pb.go
+++ b/googleapis/api/distribution/distribution.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/httpbody/httpbody.pb.go b/googleapis/api/httpbody/httpbody.pb.go
index f64f6d4..ec41cfc 100644
--- a/googleapis/api/httpbody/httpbody.pb.go
+++ b/googleapis/api/httpbody/httpbody.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/label/label.pb.go b/googleapis/api/label/label.pb.go
index fa752ef..c9eb86d 100644
--- a/googleapis/api/label/label.pb.go
+++ b/googleapis/api/label/label.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/launch_stage.pb.go b/googleapis/api/launch_stage.pb.go
index e4cb03f..51cfc19 100644
--- a/googleapis/api/launch_stage.pb.go
+++ b/googleapis/api/launch_stage.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -48,6 +47,10 @@
 const (
 	// Do not use this default value.
 	LaunchStage_LAUNCH_STAGE_UNSPECIFIED LaunchStage = 0
+	// The feature is not yet implemented. Users can not use it.
+	LaunchStage_UNIMPLEMENTED LaunchStage = 6
+	// Prelaunch features are hidden from users and are only visible internally.
+	LaunchStage_PRELAUNCH LaunchStage = 7
 	// Early Access features are limited to a closed group of testers. To use
 	// these features, you must sign up in advance and sign a Trusted Tester
 	// agreement (which includes confidentiality provisions). These features may
@@ -85,6 +88,8 @@
 var (
 	LaunchStage_name = map[int32]string{
 		0: "LAUNCH_STAGE_UNSPECIFIED",
+		6: "UNIMPLEMENTED",
+		7: "PRELAUNCH",
 		1: "EARLY_ACCESS",
 		2: "ALPHA",
 		3: "BETA",
@@ -93,6 +98,8 @@
 	}
 	LaunchStage_value = map[string]int32{
 		"LAUNCH_STAGE_UNSPECIFIED": 0,
+		"UNIMPLEMENTED":            6,
+		"PRELAUNCH":                7,
 		"EARLY_ACCESS":             1,
 		"ALPHA":                    2,
 		"BETA":                     3,
@@ -133,20 +140,22 @@
 var file_google_api_launch_stage_proto_rawDesc = []byte{
 	0x0a, 0x1d, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x6c, 0x61, 0x75,
 	0x6e, 0x63, 0x68, 0x5f, 0x73, 0x74, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12,
-	0x0a, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x61, 0x70, 0x69, 0x2a, 0x6a, 0x0a, 0x0b, 0x4c,
-	0x61, 0x75, 0x6e, 0x63, 0x68, 0x53, 0x74, 0x61, 0x67, 0x65, 0x12, 0x1c, 0x0a, 0x18, 0x4c, 0x41,
-	0x55, 0x4e, 0x43, 0x48, 0x5f, 0x53, 0x54, 0x41, 0x47, 0x45, 0x5f, 0x55, 0x4e, 0x53, 0x50, 0x45,
-	0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x10, 0x0a, 0x0c, 0x45, 0x41, 0x52, 0x4c,
-	0x59, 0x5f, 0x41, 0x43, 0x43, 0x45, 0x53, 0x53, 0x10, 0x01, 0x12, 0x09, 0x0a, 0x05, 0x41, 0x4c,
-	0x50, 0x48, 0x41, 0x10, 0x02, 0x12, 0x08, 0x0a, 0x04, 0x42, 0x45, 0x54, 0x41, 0x10, 0x03, 0x12,
-	0x06, 0x0a, 0x02, 0x47, 0x41, 0x10, 0x04, 0x12, 0x0e, 0x0a, 0x0a, 0x44, 0x45, 0x50, 0x52, 0x45,
-	0x43, 0x41, 0x54, 0x45, 0x44, 0x10, 0x05, 0x42, 0x5a, 0x0a, 0x0e, 0x63, 0x6f, 0x6d, 0x2e, 0x67,
-	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x61, 0x70, 0x69, 0x42, 0x10, 0x4c, 0x61, 0x75, 0x6e, 0x63,
-	0x68, 0x53, 0x74, 0x61, 0x67, 0x65, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x2d, 0x67,
-	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x6f, 0x72, 0x67,
-	0x2f, 0x67, 0x65, 0x6e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
-	0x61, 0x70, 0x69, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x3b, 0x61, 0x70, 0x69, 0xa2, 0x02, 0x04, 0x47,
-	0x41, 0x50, 0x49, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x0a, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x61, 0x70, 0x69, 0x2a, 0x8c, 0x01, 0x0a, 0x0b,
+	0x4c, 0x61, 0x75, 0x6e, 0x63, 0x68, 0x53, 0x74, 0x61, 0x67, 0x65, 0x12, 0x1c, 0x0a, 0x18, 0x4c,
+	0x41, 0x55, 0x4e, 0x43, 0x48, 0x5f, 0x53, 0x54, 0x41, 0x47, 0x45, 0x5f, 0x55, 0x4e, 0x53, 0x50,
+	0x45, 0x43, 0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x11, 0x0a, 0x0d, 0x55, 0x4e, 0x49,
+	0x4d, 0x50, 0x4c, 0x45, 0x4d, 0x45, 0x4e, 0x54, 0x45, 0x44, 0x10, 0x06, 0x12, 0x0d, 0x0a, 0x09,
+	0x50, 0x52, 0x45, 0x4c, 0x41, 0x55, 0x4e, 0x43, 0x48, 0x10, 0x07, 0x12, 0x10, 0x0a, 0x0c, 0x45,
+	0x41, 0x52, 0x4c, 0x59, 0x5f, 0x41, 0x43, 0x43, 0x45, 0x53, 0x53, 0x10, 0x01, 0x12, 0x09, 0x0a,
+	0x05, 0x41, 0x4c, 0x50, 0x48, 0x41, 0x10, 0x02, 0x12, 0x08, 0x0a, 0x04, 0x42, 0x45, 0x54, 0x41,
+	0x10, 0x03, 0x12, 0x06, 0x0a, 0x02, 0x47, 0x41, 0x10, 0x04, 0x12, 0x0e, 0x0a, 0x0a, 0x44, 0x45,
+	0x50, 0x52, 0x45, 0x43, 0x41, 0x54, 0x45, 0x44, 0x10, 0x05, 0x42, 0x5a, 0x0a, 0x0e, 0x63, 0x6f,
+	0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x61, 0x70, 0x69, 0x42, 0x10, 0x4c, 0x61,
+	0x75, 0x6e, 0x63, 0x68, 0x53, 0x74, 0x61, 0x67, 0x65, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01,
+	0x5a, 0x2d, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x67, 0x6f, 0x6c, 0x61, 0x6e, 0x67, 0x2e,
+	0x6f, 0x72, 0x67, 0x2f, 0x67, 0x65, 0x6e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f,
+	0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x61, 0x70, 0x69, 0x3b, 0x61, 0x70, 0x69, 0xa2,
+	0x02, 0x04, 0x47, 0x41, 0x50, 0x49, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/api/metric/metric.pb.go b/googleapis/api/metric/metric.pb.go
index e914074..c9ceca6 100644
--- a/googleapis/api/metric/metric.pb.go
+++ b/googleapis/api/metric/metric.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -179,6 +178,18 @@
 // Defines a metric type and its schema. Once a metric descriptor is created,
 // deleting or altering it stops data collection and makes the metric type's
 // existing data unusable.
+//
+// The following are specific rules for service defined Monitoring metric
+// descriptors:
+//
+// * `type`, `metric_kind`, `value_type`, `description`, `display_name`,
+//   `launch_stage` fields are all required. The `unit` field must be specified
+//   if the `value_type` is any of DOUBLE, INT64, DISTRIBUTION.
+// * Maximum of default 500 metric descriptors per service is allowed.
+// * Maximum of default 10 labels per metric descriptor is allowed.
+//
+// The default maximum limit can be overridden. Please follow
+// https://cloud.google.com/monitoring/quotas
 type MetricDescriptor struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -187,16 +198,39 @@
 	// The resource name of the metric descriptor.
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// The metric type, including its DNS name prefix. The type is not
-	// URL-encoded.  All user-defined metric types have the DNS name
-	// `custom.googleapis.com` or `external.googleapis.com`.  Metric types should
-	// use a natural hierarchical grouping. For example:
+	// URL-encoded.
+	//
+	// All service defined metrics must be prefixed with the service name, in the
+	// format of `{service name}/{relative metric name}`, such as
+	// `cloudsql.googleapis.com/database/cpu/utilization`. The relative metric
+	// name must follow:
+	//
+	// * Only upper and lower-case letters, digits, '/' and underscores '_' are
+	//   allowed.
+	// * The maximum number of characters allowed for the relative_metric_name is
+	//   100.
+	//
+	// All user-defined metric types have the DNS name
+	// `custom.googleapis.com`, `external.googleapis.com`, or
+	// `logging.googleapis.com/user/`.
+	//
+	// Metric types should use a natural hierarchical grouping. For example:
 	//
 	//     "custom.googleapis.com/invoice/paid/amount"
 	//     "external.googleapis.com/prometheus/up"
 	//     "appengine.googleapis.com/http/server/response_latencies"
 	Type string `protobuf:"bytes,8,opt,name=type,proto3" json:"type,omitempty"`
 	// The set of labels that can be used to describe a specific
-	// instance of this metric type. For example, the
+	// instance of this metric type.
+	//
+	// The label key name must follow:
+	//
+	// * Only upper and lower-case letters, digits and underscores (_) are
+	//   allowed.
+	// * Label name must start with a letter or digit.
+	// * The maximum length of a label name is 100 characters.
+	//
+	// For example, the
 	// `appengine.googleapis.com/http/server/response_latencies` metric
 	// type has a label for the HTTP response code, `response_code`, so
 	// you can look at latencies for successful responses or just
@@ -223,7 +257,7 @@
 	// `s{CPU}` (or equivalently `1s{CPU}` or just `s`). If the job uses 12,005
 	// CPU-seconds, then the value is written as `12005`.
 	//
-	// Alternatively, if you want a custome metric to record data in a more
+	// Alternatively, if you want a custom metric to record data in a more
 	// granular way, you can create a `DOUBLE CUMULATIVE` metric whose `unit` is
 	// `ks{CPU}`, and then write the value `12.005` (which is `12005/1000`),
 	// or use `Kis{CPU}` and write `11.723` (which is `12005/1024`).
@@ -309,7 +343,6 @@
 	// * `10^2.%` indicates a metric contains a ratio, typically in the range
 	//    0..1, that will be multiplied by 100 and displayed as a percentage
 	//    (so a metric value `0.03` means "3 percent").
-	//
 	Unit string `protobuf:"bytes,5,opt,name=unit,proto3" json:"unit,omitempty"`
 	// A detailed description of the metric, which can be used in documentation.
 	Description string `protobuf:"bytes,6,opt,name=description,proto3" json:"description,omitempty"`
@@ -322,6 +355,12 @@
 	Metadata *MetricDescriptor_MetricDescriptorMetadata `protobuf:"bytes,10,opt,name=metadata,proto3" json:"metadata,omitempty"`
 	// Optional. The launch stage of the metric definition.
 	LaunchStage api.LaunchStage `protobuf:"varint,12,opt,name=launch_stage,json=launchStage,proto3,enum=google.api.LaunchStage" json:"launch_stage,omitempty"`
+	// Read-only. If present, then a [time
+	// series][google.monitoring.v3.TimeSeries], which is identified partially by
+	// a metric type and a [MonitoredResourceDescriptor][google.api.MonitoredResourceDescriptor], that is associated
+	// with this metric type can only be associated with one of the monitored
+	// resource types listed here.
+	MonitoredResourceTypes []string `protobuf:"bytes,13,rep,name=monitored_resource_types,json=monitoredResourceTypes,proto3" json:"monitored_resource_types,omitempty"`
 }
 
 func (x *MetricDescriptor) Reset() {
@@ -426,6 +465,13 @@
 	return api.LaunchStage_LAUNCH_STAGE_UNSPECIFIED
 }
 
+func (x *MetricDescriptor) GetMonitoredResourceTypes() []string {
+	if x != nil {
+		return x.MonitoredResourceTypes
+	}
+	return nil
+}
+
 // A specific metric, identified by specifying values for all of the
 // labels of a [`MetricDescriptor`][google.api.MetricDescriptor].
 type Metric struct {
@@ -493,8 +539,7 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Deprecated. Please use the MetricDescriptor.launch_stage instead.
-	// The launch stage of the metric definition.
+	// Deprecated. Must use the [MetricDescriptor.launch_stage][google.api.MetricDescriptor.launch_stage] instead.
 	//
 	// Deprecated: Do not use.
 	LaunchStage api.LaunchStage `protobuf:"varint,1,opt,name=launch_stage,json=launchStage,proto3,enum=google.api.LaunchStage" json:"launch_stage,omitempty"`
@@ -573,7 +618,7 @@
 	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x6c, 0x61, 0x75, 0x6e, 0x63, 0x68,
 	0x5f, 0x73, 0x74, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1e, 0x67, 0x6f,
 	0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x64, 0x75,
-	0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x87, 0x07, 0x0a,
+	0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xc1, 0x07, 0x0a,
 	0x10, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x44, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x6f,
 	0x72, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52,
 	0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x08, 0x20,
@@ -604,49 +649,52 @@
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 }
 
 var (
diff --git a/googleapis/api/monitoredres/monitored_resource.pb.go b/googleapis/api/monitoredres/monitored_resource.pb.go
index cdbfc23..378ac5b 100644
--- a/googleapis/api/monitoredres/monitored_resource.pb.go
+++ b/googleapis/api/monitoredres/monitored_resource.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -50,9 +49,22 @@
 // `"gce_instance"` and specifies the use of the labels `"instance_id"` and
 // `"zone"` to identify particular VM instances.
 //
-// Different APIs can support different monitored resource types. APIs generally
-// provide a `list` method that returns the monitored resource descriptors used
-// by the API.
+// Different services can support different monitored resource types.
+//
+// The following are specific rules to service defined monitored resources for
+// Monitoring and Logging:
+//
+// * The `type`, `display_name`, `description`, `labels` and `launch_stage`
+//   fields are all required.
+// * The first label of the monitored resource descriptor must be
+//   `resource_container`. There are legacy monitored resource descritptors
+//   start with `project_id`.
+// * It must include a `location` label. * Maximum of default 5 service defined monitored resource descriptors
+//   is allowed per service.
+// * Maximum of default 10 labels per monitored resource is allowed.
+//
+// The default maximum limit can be overridden. Please follow
+// https://cloud.google.com/monitoring/quotas
 type MonitoredResourceDescriptor struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -65,9 +77,7 @@
 	// accessing the type.  APIs that do not use project information can use the
 	// resource name format `"monitoredResourceDescriptors/{type}"`.
 	Name string `protobuf:"bytes,5,opt,name=name,proto3" json:"name,omitempty"`
-	// Required. The monitored resource type. For example, the type
-	// `"cloudsql_database"` represents databases in Google Cloud SQL.
-	// The maximum length of this value is 256 characters.
+	// Note there are legacy service monitored resources not following this rule.
 	Type string `protobuf:"bytes,1,opt,name=type,proto3" json:"type,omitempty"`
 	// Optional. A concise name for the monitored resource type that might be
 	// displayed in user interfaces. It should be a Title Cased Noun Phrase,
@@ -78,8 +88,16 @@
 	// be used in documentation.
 	Description string `protobuf:"bytes,3,opt,name=description,proto3" json:"description,omitempty"`
 	// Required. A set of labels used to describe instances of this monitored
-	// resource type. For example, an individual Google Cloud SQL database is
-	// identified by values for the labels `"database_id"` and `"zone"`.
+	// resource type.
+	// The label key name must follow:
+	//
+	// * Only upper and lower-case letters, digits and underscores (_) are
+	//   allowed.
+	// * Label name must start with a letter or digit.
+	// * The maximum length of a label name is 100 characters.
+	//
+	// For example, an individual Google Cloud SQL database is
+	// identified by values for the labels `database_id` and `location`.
 	Labels []*label.LabelDescriptor `protobuf:"bytes,4,rep,name=labels,proto3" json:"labels,omitempty"`
 	// Optional. The launch stage of the monitored resource definition.
 	LaunchStage api.LaunchStage `protobuf:"varint,7,opt,name=launch_stage,json=launchStage,proto3,enum=google.api.LaunchStage" json:"launch_stage,omitempty"`
diff --git a/googleapis/api/serviceconfig/auth.pb.go b/googleapis/api/serviceconfig/auth.pb.go
index 0b6571d..bf55f33 100644
--- a/googleapis/api/serviceconfig/auth.pb.go
+++ b/googleapis/api/serviceconfig/auth.pb.go
@@ -334,11 +334,15 @@
 	// The list of JWT
 	// [audiences](https://tools.ietf.org/html/draft-ietf-oauth-json-web-token-32#section-4.1.3).
 	// that are allowed to access. A JWT containing any of these audiences will
-	// be accepted. When this setting is absent, only JWTs with audience
-	// "https://[Service_name][google.api.Service.name]/[API_name][google.protobuf.Api.name]"
-	// will be accepted. For example, if no audiences are in the setting,
-	// LibraryService API will only accept JWTs with the following audience
-	// "https://library-example.googleapis.com/google.example.library.v1.LibraryService".
+	// be accepted. When this setting is absent, JWTs with audiences:
+	//   - "https://[service.name]/[google.protobuf.Api.name]"
+	//   - "https://[service.name]/"
+	// will be accepted.
+	// For example, if no audiences are in the setting, LibraryService API will
+	// accept JWTs with the following audiences:
+	//   -
+	//   https://library-example.googleapis.com/google.example.library.v1.LibraryService
+	//   - https://library-example.googleapis.com/
 	//
 	// Example:
 	//
diff --git a/googleapis/api/serviceconfig/backend.pb.go b/googleapis/api/serviceconfig/backend.pb.go
index 7858c79..fb0bace 100644
--- a/googleapis/api/serviceconfig/backend.pb.go
+++ b/googleapis/api/serviceconfig/backend.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/billing.pb.go b/googleapis/api/serviceconfig/billing.pb.go
index 1cf48d4..334989c 100644
--- a/googleapis/api/serviceconfig/billing.pb.go
+++ b/googleapis/api/serviceconfig/billing.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -45,22 +44,33 @@
 // Billing related configuration of the service.
 //
 // The following example shows how to configure monitored resources and metrics
-// for billing:
+// for billing, `consumer_destinations` is the only supported destination and
+// the monitored resources need at least one label key
+// `cloud.googleapis.com/location` to indicate the location of the billing
+// usage, using different monitored resources between monitoring and billing is
+// recommended so they can be evolved independently:
+//
 //
 //     monitored_resources:
-//     - type: library.googleapis.com/branch
+//     - type: library.googleapis.com/billing_branch
 //       labels:
-//       - key: /city
-//         description: The city where the library branch is located in.
-//       - key: /name
-//         description: The name of the branch.
+//       - key: cloud.googleapis.com/location
+//         description: |
+//           Predefined label to support billing location restriction.
+//       - key: city
+//         description: |
+//           Custom label to define the city where the library branch is located
+//           in.
+//       - key: name
+//         description: Custom label to define the name of the library branch.
 //     metrics:
 //     - name: library.googleapis.com/book/borrowed_count
 //       metric_kind: DELTA
 //       value_type: INT64
+//       unit: "1"
 //     billing:
 //       consumer_destinations:
-//       - monitored_resource: library.googleapis.com/branch
+//       - monitored_resource: library.googleapis.com/billing_branch
 //         metrics:
 //         - library.googleapis.com/book/borrowed_count
 type Billing struct {
diff --git a/googleapis/api/serviceconfig/context.pb.go b/googleapis/api/serviceconfig/context.pb.go
index 800569a..cd235bc 100644
--- a/googleapis/api/serviceconfig/context.pb.go
+++ b/googleapis/api/serviceconfig/context.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/control.pb.go b/googleapis/api/serviceconfig/control.pb.go
index 8813745..0843ab7 100644
--- a/googleapis/api/serviceconfig/control.pb.go
+++ b/googleapis/api/serviceconfig/control.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/documentation.pb.go b/googleapis/api/serviceconfig/documentation.pb.go
index f807831..6d8825f 100644
--- a/googleapis/api/serviceconfig/documentation.pb.go
+++ b/googleapis/api/serviceconfig/documentation.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -112,6 +111,11 @@
 	Rules []*DocumentationRule `protobuf:"bytes,3,rep,name=rules,proto3" json:"rules,omitempty"`
 	// The URL to the root of documentation.
 	DocumentationRootUrl string `protobuf:"bytes,4,opt,name=documentation_root_url,json=documentationRootUrl,proto3" json:"documentation_root_url,omitempty"`
+	// Specifies the service root url if the default one (the service name
+	// from the yaml file) is not suitable. This can be seen in any fully
+	// specified service urls as well as sections that show a base that other
+	// urls are relative to.
+	ServiceRootUrl string `protobuf:"bytes,6,opt,name=service_root_url,json=serviceRootUrl,proto3" json:"service_root_url,omitempty"`
 	// Declares a single overview page. For example:
 	// <pre><code>documentation:
 	//   summary: ...
@@ -188,6 +192,13 @@
 	return ""
 }
 
+func (x *Documentation) GetServiceRootUrl() string {
+	if x != nil {
+		return x.ServiceRootUrl
+	}
+	return ""
+}
+
 func (x *Documentation) GetOverview() string {
 	if x != nil {
 		return x.Overview
@@ -356,7 +367,7 @@
 var file_google_api_documentation_proto_rawDesc = []byte{
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@@ -368,32 +379,34 @@
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 }
 
 var (
diff --git a/googleapis/api/serviceconfig/endpoint.pb.go b/googleapis/api/serviceconfig/endpoint.pb.go
index 9c6c862..06499b2 100644
--- a/googleapis/api/serviceconfig/endpoint.pb.go
+++ b/googleapis/api/serviceconfig/endpoint.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -72,8 +71,6 @@
 	//
 	// Deprecated: Do not use.
 	Aliases []string `protobuf:"bytes,2,rep,name=aliases,proto3" json:"aliases,omitempty"`
-	// The list of features enabled on this endpoint.
-	Features []string `protobuf:"bytes,4,rep,name=features,proto3" json:"features,omitempty"`
 	// The specification of an Internet routable address of API frontend that will
 	// handle requests to this [API
 	// Endpoint](https://cloud.google.com/apis/design/glossary). It should be
@@ -136,13 +133,6 @@
 	return nil
 }
 
-func (x *Endpoint) GetFeatures() []string {
-	if x != nil {
-		return x.Features
-	}
-	return nil
-}
-
 func (x *Endpoint) GetTarget() string {
 	if x != nil {
 		return x.Target
@@ -162,24 +152,22 @@
 var file_google_api_endpoint_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/googleapis/api/serviceconfig/log.pb.go b/googleapis/api/serviceconfig/log.pb.go
index a87c82f..8cd50a2 100644
--- a/googleapis/api/serviceconfig/log.pb.go
+++ b/googleapis/api/serviceconfig/log.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/logging.pb.go b/googleapis/api/serviceconfig/logging.pb.go
index c811e9e..acae482 100644
--- a/googleapis/api/serviceconfig/logging.pb.go
+++ b/googleapis/api/serviceconfig/logging.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/monitoring.pb.go b/googleapis/api/serviceconfig/monitoring.pb.go
index 8a011aa..563f6e0 100644
--- a/googleapis/api/serviceconfig/monitoring.pb.go
+++ b/googleapis/api/serviceconfig/monitoring.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/quota.pb.go b/googleapis/api/serviceconfig/quota.pb.go
index ed8c62f..edfd25b 100644
--- a/googleapis/api/serviceconfig/quota.pb.go
+++ b/googleapis/api/serviceconfig/quota.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -265,10 +264,7 @@
 	//
 	// Used by group-based quotas only.
 	FreeTier int64 `protobuf:"varint,7,opt,name=free_tier,json=freeTier,proto3" json:"free_tier,omitempty"`
-	// Duration of this limit in textual notation. Example: "100s", "24h", "1d".
-	// For duration longer than a day, only multiple of days is supported. We
-	// support only "100s" and "1d" for now. Additional support will be added in
-	// the future. "0" indicates indefinite duration.
+	// Duration of this limit in textual notation. Must be "100s" or "1d".
 	//
 	// Used by group-based quotas only.
 	Duration string `protobuf:"bytes,5,opt,name=duration,proto3" json:"duration,omitempty"`
diff --git a/googleapis/api/serviceconfig/service.pb.go b/googleapis/api/serviceconfig/service.pb.go
index a7dbb5b..f162b75 100644
--- a/googleapis/api/serviceconfig/service.pb.go
+++ b/googleapis/api/serviceconfig/service.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -80,6 +79,7 @@
 	// The semantic version of the service configuration. The config version
 	// affects the interpretation of the service configuration. For example,
 	// certain features are enabled by default for certain config versions.
+	//
 	// The latest config version is `3`.
 	ConfigVersion *wrappers.UInt32Value `protobuf:"bytes,20,opt,name=config_version,json=configVersion,proto3" json:"config_version,omitempty"`
 	// The service name, which is a DNS-like logical identifier for the
@@ -88,8 +88,9 @@
 	// of the service also owns the DNS name.
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 	// A unique ID for a specific instance of this message, typically assigned
-	// by the client for tracking purpose. If empty, the server may choose to
-	// generate one instead. Must be no longer than 60 characters.
+	// by the client for tracking purpose. Must be no longer than 63 characters
+	// and only lower case letters, digits, '.', '_' and '-' are allowed. If
+	// empty, the server may choose to generate one instead.
 	Id string `protobuf:"bytes,33,opt,name=id,proto3" json:"id,omitempty"`
 	// The product title for this service.
 	Title string `protobuf:"bytes,2,opt,name=title,proto3" json:"title,omitempty"`
diff --git a/googleapis/api/serviceconfig/source_info.pb.go b/googleapis/api/serviceconfig/source_info.pb.go
index 3642d58..2964563 100644
--- a/googleapis/api/serviceconfig/source_info.pb.go
+++ b/googleapis/api/serviceconfig/source_info.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/system_parameter.pb.go b/googleapis/api/serviceconfig/system_parameter.pb.go
index a1821c4..559ae3a 100644
--- a/googleapis/api/serviceconfig/system_parameter.pb.go
+++ b/googleapis/api/serviceconfig/system_parameter.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/api/serviceconfig/usage.pb.go b/googleapis/api/serviceconfig/usage.pb.go
index 327ec7c..9baae63 100644
--- a/googleapis/api/serviceconfig/usage.pb.go
+++ b/googleapis/api/serviceconfig/usage.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/cloud/documentai/v1beta1/document.pb.go b/googleapis/cloud/documentai/v1beta1/document.pb.go
index 7e30b2b..8c7df30 100644
--- a/googleapis/cloud/documentai/v1beta1/document.pb.go
+++ b/googleapis/cloud/documentai/v1beta1/document.pb.go
@@ -2220,7 +2220,7 @@
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@@ -2228,8 +2228,14 @@
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 }
 
 var (
diff --git a/googleapis/cloud/documentai/v1beta1/document_understanding.pb.go b/googleapis/cloud/documentai/v1beta1/document_understanding.pb.go
index 453c64b..30596ce 100644
--- a/googleapis/cloud/documentai/v1beta1/document_understanding.pb.go
+++ b/googleapis/cloud/documentai/v1beta1/document_understanding.pb.go
@@ -1353,7 +1353,7 @@
 	0x6d, 0xd2, 0x41, 0x2e, 0x68, 0x74, 0x74, 0x70, 0x73, 0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e,
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-	0x72, 0x6d, 0x42, 0x83, 0x01, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x72, 0x6d, 0x42, 0xec, 0x01, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
 	0x65, 0x2e, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2e, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74,
 	0x61, 0x69, 0x2e, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x31, 0x42, 0x0f, 0x44, 0x6f, 0x63, 0x75,
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@@ -1361,7 +1361,14 @@
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+	0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/cloud/documentai/v1beta1/geometry.pb.go b/googleapis/cloud/documentai/v1beta1/geometry.pb.go
index 22a963a..50888e0 100644
--- a/googleapis/cloud/documentai/v1beta1/geometry.pb.go
+++ b/googleapis/cloud/documentai/v1beta1/geometry.pb.go
@@ -246,7 +246,7 @@
 	0x61, 0x69, 0x2e, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x31, 0x2e, 0x4e, 0x6f, 0x72, 0x6d, 0x61,
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@@ -254,7 +254,14 @@
 	0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73, 0x2f,
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 	0x2f, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x31, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e,
-	0x74, 0x61, 0x69, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x61, 0x69, 0xaa, 0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x43, 0x6c, 0x6f,
+	0x75, 0x64, 0x2e, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x2e, 0x56, 0x31,
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+	0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x31, 0xea, 0x02, 0x22, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
+	0x3a, 0x3a, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x3a, 0x3a, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e,
+	0x74, 0x41, 0x49, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x31, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/cloud/documentai/v1beta2/document.pb.go b/googleapis/cloud/documentai/v1beta2/document.pb.go
index fe34e03..7c39c59 100644
--- a/googleapis/cloud/documentai/v1beta2/document.pb.go
+++ b/googleapis/cloud/documentai/v1beta2/document.pb.go
@@ -2626,7 +2626,7 @@
 	0x04, 0x12, 0x12, 0x0a, 0x0e, 0x56, 0x49, 0x53, 0x55, 0x41, 0x4c, 0x5f, 0x45, 0x4c, 0x45, 0x4d,
 	0x45, 0x4e, 0x54, 0x10, 0x05, 0x12, 0x09, 0x0a, 0x05, 0x54, 0x41, 0x42, 0x4c, 0x45, 0x10, 0x06,
 	0x12, 0x0e, 0x0a, 0x0a, 0x46, 0x4f, 0x52, 0x4d, 0x5f, 0x46, 0x49, 0x45, 0x4c, 0x44, 0x10, 0x07,
-	0x42, 0x08, 0x0a, 0x06, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x42, 0x81, 0x01, 0x0a, 0x23, 0x63,
+	0x42, 0x08, 0x0a, 0x06, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x42, 0xea, 0x01, 0x0a, 0x23, 0x63,
 	0x6f, 0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2e,
 	0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x2e, 0x76, 0x31, 0x62, 0x65, 0x74,
 	0x61, 0x32, 0x42, 0x0d, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x50, 0x72, 0x6f, 0x74,
@@ -2634,8 +2634,14 @@
 	0x6e, 0x67, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x67, 0x65, 0x6e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f,
 	0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x63, 0x6c, 0x6f, 0x75, 0x64,
 	0x2f, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x2f, 0x76, 0x31, 0x62, 0x65,
-	0x74, 0x61, 0x32, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x61, 0x32, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0xaa, 0x02,
+	0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x2e, 0x44, 0x6f,
+	0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x2e, 0x56, 0x31, 0x42, 0x65, 0x74, 0x61, 0x32,
+	0xca, 0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x5c, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x5c,
+	0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x69, 0x5c, 0x56, 0x31, 0x62, 0x65, 0x74,
+	0x61, 0x32, 0xea, 0x02, 0x22, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x3a, 0x3a, 0x43, 0x6c, 0x6f,
+	0x75, 0x64, 0x3a, 0x3a, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x3a, 0x3a,
+	0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go b/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
index e383e02..22f46db 100644
--- a/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
+++ b/googleapis/cloud/documentai/v1beta2/document_understanding.pb.go
@@ -1483,7 +1483,7 @@
 	0x61, 0x70, 0x69, 0x73, 0x2e, 0x63, 0x6f, 0x6d, 0xd2, 0x41, 0x2e, 0x68, 0x74, 0x74, 0x70, 0x73,
 	0x3a, 0x2f, 0x2f, 0x77, 0x77, 0x77, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69,
 	0x73, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x61, 0x75, 0x74, 0x68, 0x2f, 0x63, 0x6c, 0x6f, 0x75, 0x64,
-	0x2d, 0x70, 0x6c, 0x61, 0x74, 0x66, 0x6f, 0x72, 0x6d, 0x42, 0x83, 0x01, 0x0a, 0x23, 0x63, 0x6f,
+	0x2d, 0x70, 0x6c, 0x61, 0x74, 0x66, 0x6f, 0x72, 0x6d, 0x42, 0xec, 0x01, 0x0a, 0x23, 0x63, 0x6f,
 	0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2e, 0x64,
 	0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x2e, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61,
 	0x32, 0x42, 0x0f, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x69, 0x50, 0x72, 0x6f,
@@ -1491,8 +1491,14 @@
 	0x61, 0x6e, 0x67, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x67, 0x65, 0x6e, 0x70, 0x72, 0x6f, 0x74, 0x6f,
 	0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73, 0x2f, 0x63, 0x6c, 0x6f, 0x75,
 	0x64, 0x2f, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x2f, 0x76, 0x31, 0x62,
-	0x65, 0x74, 0x61, 0x32, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x62,
-	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x65, 0x74, 0x61, 0x32, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0xaa,
+	0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x2e, 0x44,
+	0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x2e, 0x56, 0x31, 0x42, 0x65, 0x74, 0x61,
+	0x32, 0xca, 0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x5c, 0x43, 0x6c, 0x6f, 0x75, 0x64,
+	0x5c, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x69, 0x5c, 0x56, 0x31, 0x62, 0x65,
+	0x74, 0x61, 0x32, 0xea, 0x02, 0x22, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x3a, 0x3a, 0x43, 0x6c,
+	0x6f, 0x75, 0x64, 0x3a, 0x3a, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x3a,
+	0x3a, 0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/cloud/documentai/v1beta2/geometry.pb.go b/googleapis/cloud/documentai/v1beta2/geometry.pb.go
index ea60a1c..ad18480 100644
--- a/googleapis/cloud/documentai/v1beta2/geometry.pb.go
+++ b/googleapis/cloud/documentai/v1beta2/geometry.pb.go
@@ -245,7 +245,7 @@
 	0x61, 0x69, 0x2e, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x2e, 0x4e, 0x6f, 0x72, 0x6d, 0x61,
 	0x6c, 0x69, 0x7a, 0x65, 0x64, 0x56, 0x65, 0x72, 0x74, 0x65, 0x78, 0x52, 0x12, 0x6e, 0x6f, 0x72,
 	0x6d, 0x61, 0x6c, 0x69, 0x7a, 0x65, 0x64, 0x56, 0x65, 0x72, 0x74, 0x69, 0x63, 0x65, 0x73, 0x42,
-	0x81, 0x01, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x63,
+	0xea, 0x01, 0x0a, 0x23, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x63,
 	0x6c, 0x6f, 0x75, 0x64, 0x2e, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69, 0x2e,
 	0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x42, 0x0d, 0x47, 0x65, 0x6f, 0x6d, 0x65, 0x74, 0x72,
 	0x79, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x49, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
@@ -253,7 +253,14 @@
 	0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x61, 0x70, 0x69, 0x73, 0x2f,
 	0x63, 0x6c, 0x6f, 0x75, 0x64, 0x2f, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x61, 0x69,
 	0x2f, 0x76, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x3b, 0x64, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e,
-	0x74, 0x61, 0x69, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x61, 0x69, 0xaa, 0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x43, 0x6c, 0x6f,
+	0x75, 0x64, 0x2e, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x49, 0x2e, 0x56, 0x31,
+	0x42, 0x65, 0x74, 0x61, 0x32, 0xca, 0x02, 0x1f, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x5c, 0x43,
+	0x6c, 0x6f, 0x75, 0x64, 0x5c, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e, 0x74, 0x41, 0x69, 0x5c,
+	0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0xea, 0x02, 0x22, 0x47, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
+	0x3a, 0x3a, 0x43, 0x6c, 0x6f, 0x75, 0x64, 0x3a, 0x3a, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65, 0x6e,
+	0x74, 0x41, 0x49, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x65, 0x74, 0x61, 0x32, 0x62, 0x06, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/googleapis/monitoring/dashboard/v1/common.pb.go b/googleapis/monitoring/dashboard/v1/common.pb.go
index 4bad542..047ecb3 100644
--- a/googleapis/monitoring/dashboard/v1/common.pb.go
+++ b/googleapis/monitoring/dashboard/v1/common.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -27,6 +26,7 @@
 
 	proto "github.com/golang/protobuf/proto"
 	duration "github.com/golang/protobuf/ptypes/duration"
+	_ "google.golang.org/genproto/googleapis/api/distribution"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 )
@@ -42,140 +42,146 @@
 // of the legacy proto package is being used.
 const _ = proto.ProtoPackageIsVersion4
 
-// The Aligner describes how to bring the data points in a single
-// time series into temporal alignment.
+// The `Aligner` specifies the operation that will be applied to the data
+// points in each alignment period in a time series. Except for
+// `ALIGN_NONE`, which specifies that no operation be applied, each alignment
+// operation replaces the set of data values in each alignment period with
+// a single value: the result of applying the operation to the data values.
+// An aligned time series has a single data value at the end of each
+// `alignment_period`.
+//
+// An alignment operation can change the data type of the values, too. For
+// example, if you apply a counting operation to boolean values, the data
+// `value_type` in the original time series is `BOOLEAN`, but the `value_type`
+// in the aligned result is `INT64`.
 type Aggregation_Aligner int32
 
 const (
-	// No alignment. Raw data is returned. Not valid if cross-time
-	// series reduction is requested. The value type of the result is
-	// the same as the value type of the input.
+	// No alignment. Raw data is returned. Not valid if cross-series reduction
+	// is requested. The `value_type` of the result is the same as the
+	// `value_type` of the input.
 	Aggregation_ALIGN_NONE Aggregation_Aligner = 0
-	// Align and convert to delta metric type. This alignment is valid
-	// for cumulative metrics and delta metrics. Aligning an existing
-	// delta metric to a delta metric requires that the alignment
-	// period be increased. The value type of the result is the same
-	// as the value type of the input.
+	// Align and convert to
+	// [DELTA][google.api.MetricDescriptor.MetricKind.DELTA].
+	// The output is `delta = y1 - y0`.
 	//
-	// One can think of this aligner as a rate but without time units; that
-	// is, the output is conceptually (second_point - first_point).
+	// This alignment is valid for
+	// [CUMULATIVE][google.api.MetricDescriptor.MetricKind.CUMULATIVE] and
+	// `DELTA` metrics. If the selected alignment period results in periods
+	// with no data, then the aligned value for such a period is created by
+	// interpolation. The `value_type`  of the aligned result is the same as
+	// the `value_type` of the input.
 	Aggregation_ALIGN_DELTA Aggregation_Aligner = 1
-	// Align and convert to a rate. This alignment is valid for
-	// cumulative metrics and delta metrics with numeric values. The output is a
-	// gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align and convert to a rate. The result is computed as
+	// `rate = (y1 - y0)/(t1 - t0)`, or "delta over time".
+	// Think of this aligner as providing the slope of the line that passes
+	// through the value at the start and at the end of the `alignment_period`.
 	//
-	// One can think of this aligner as conceptually providing the slope of
-	// the line that passes through the value at the start and end of the
-	// window. In other words, this is conceptually ((y1 - y0)/(t1 - t0)),
-	// and the output unit is one that has a "/time" dimension.
+	// This aligner is valid for `CUMULATIVE`
+	// and `DELTA` metrics with numeric values. If the selected alignment
+	// period results in periods with no data, then the aligned value for
+	// such a period is created by interpolation. The output is a `GAUGE`
+	// metric with `value_type` `DOUBLE`.
 	//
-	// If, by rate, you are looking for percentage change, see the
-	// `ALIGN_PERCENT_CHANGE` aligner option.
+	// If, by "rate", you mean "percentage change", see the
+	// `ALIGN_PERCENT_CHANGE` aligner instead.
 	Aggregation_ALIGN_RATE Aggregation_Aligner = 2
-	// Align by interpolating between adjacent points around the
-	// period boundary. This alignment is valid for gauge
-	// metrics with numeric values. The value type of the result is the same
-	// as the value type of the input.
+	// Align by interpolating between adjacent points around the alignment
+	// period boundary. This aligner is valid for `GAUGE` metrics with
+	// numeric values. The `value_type` of the aligned result is the same as the
+	// `value_type` of the input.
 	Aggregation_ALIGN_INTERPOLATE Aggregation_Aligner = 3
-	// Align by shifting the oldest data point before the period
-	// boundary to the boundary. This alignment is valid for gauge
-	// metrics. The value type of the result is the same as the
-	// value type of the input.
+	// Align by moving the most recent data point before the end of the
+	// alignment period to the boundary at the end of the alignment
+	// period. This aligner is valid for `GAUGE` metrics. The `value_type` of
+	// the aligned result is the same as the `value_type` of the input.
 	Aggregation_ALIGN_NEXT_OLDER Aggregation_Aligner = 4
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the minimum of all data points in the
-	// period. This alignment is valid for gauge and delta metrics with numeric
-	// values. The value type of the result is the same as the value
-	// type of the input.
+	// Align the time series by returning the minimum value in each alignment
+	// period. This aligner is valid for `GAUGE` and `DELTA` metrics with
+	// numeric values. The `value_type` of the aligned result is the same as
+	// the `value_type` of the input.
 	Aggregation_ALIGN_MIN Aggregation_Aligner = 10
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the maximum of all data points in the
-	// period. This alignment is valid for gauge and delta metrics with numeric
-	// values. The value type of the result is the same as the value
-	// type of the input.
+	// Align the time series by returning the maximum value in each alignment
+	// period. This aligner is valid for `GAUGE` and `DELTA` metrics with
+	// numeric values. The `value_type` of the aligned result is the same as
+	// the `value_type` of the input.
 	Aggregation_ALIGN_MAX Aggregation_Aligner = 11
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the average or arithmetic mean of all
-	// data points in the period. This alignment is valid for gauge and delta
-	// metrics with numeric values. The value type of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by returning the mean value in each alignment
+	// period. This aligner is valid for `GAUGE` and `DELTA` metrics with
+	// numeric values. The `value_type` of the aligned result is `DOUBLE`.
 	Aggregation_ALIGN_MEAN Aggregation_Aligner = 12
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the count of all data points in the
-	// period. This alignment is valid for gauge and delta metrics with numeric
-	// or Boolean values. The value type of the output is
-	// [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Align the time series by returning the number of values in each alignment
+	// period. This aligner is valid for `GAUGE` and `DELTA` metrics with
+	// numeric or Boolean values. The `value_type` of the aligned result is
+	// `INT64`.
 	Aggregation_ALIGN_COUNT Aggregation_Aligner = 13
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the sum of all data points in the
-	// period. This alignment is valid for gauge and delta metrics with numeric
-	// and distribution values. The value type of the output is the
-	// same as the value type of the input.
+	// Align the time series by returning the sum of the values in each
+	// alignment period. This aligner is valid for `GAUGE` and `DELTA`
+	// metrics with numeric and distribution values. The `value_type` of the
+	// aligned result is the same as the `value_type` of the input.
 	Aggregation_ALIGN_SUM Aggregation_Aligner = 14
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the standard deviation of all data
-	// points in the period. This alignment is valid for gauge and delta metrics
-	// with numeric values. The value type of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by returning the standard deviation of the values
+	// in each alignment period. This aligner is valid for `GAUGE` and
+	// `DELTA` metrics with numeric values. The `value_type` of the output is
+	// `DOUBLE`.
 	Aggregation_ALIGN_STDDEV Aggregation_Aligner = 15
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the count of True-valued data points in the
-	// period. This alignment is valid for gauge metrics with
-	// Boolean values. The value type of the output is
-	// [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Align the time series by returning the number of `True` values in
+	// each alignment period. This aligner is valid for `GAUGE` metrics with
+	// Boolean values. The `value_type` of the output is `INT64`.
 	Aggregation_ALIGN_COUNT_TRUE Aggregation_Aligner = 16
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the count of False-valued data points in the
-	// period. This alignment is valid for gauge metrics with
-	// Boolean values. The value type of the output is
-	// [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Align the time series by returning the number of `False` values in
+	// each alignment period. This aligner is valid for `GAUGE` metrics with
+	// Boolean values. The `value_type` of the output is `INT64`.
 	Aggregation_ALIGN_COUNT_FALSE Aggregation_Aligner = 24
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the fraction of True-valued data points in the
-	// period. This alignment is valid for gauge metrics with Boolean values.
-	// The output value is in the range [0, 1] and has value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by returning the ratio of the number of `True`
+	// values to the total number of values in each alignment period. This
+	// aligner is valid for `GAUGE` metrics with Boolean values. The output
+	// value is in the range [0.0, 1.0] and has `value_type` `DOUBLE`.
 	Aggregation_ALIGN_FRACTION_TRUE Aggregation_Aligner = 17
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the 99th percentile of all data
-	// points in the period. This alignment is valid for gauge and delta metrics
-	// with distribution values. The output is a gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by using [percentile
+	// aggregation](https://en.wikipedia.org/wiki/Percentile). The resulting
+	// data point in each alignment period is the 99th percentile of all data
+	// points in the period. This aligner is valid for `GAUGE` and `DELTA`
+	// metrics with distribution values. The output is a `GAUGE` metric with
+	// `value_type` `DOUBLE`.
 	Aggregation_ALIGN_PERCENTILE_99 Aggregation_Aligner = 18
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the 95th percentile of all data
-	// points in the period. This alignment is valid for gauge and delta metrics
-	// with distribution values. The output is a gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by using [percentile
+	// aggregation](https://en.wikipedia.org/wiki/Percentile). The resulting
+	// data point in each alignment period is the 95th percentile of all data
+	// points in the period. This aligner is valid for `GAUGE` and `DELTA`
+	// metrics with distribution values. The output is a `GAUGE` metric with
+	// `value_type` `DOUBLE`.
 	Aggregation_ALIGN_PERCENTILE_95 Aggregation_Aligner = 19
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the 50th percentile of all data
-	// points in the period. This alignment is valid for gauge and delta metrics
-	// with distribution values. The output is a gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by using [percentile
+	// aggregation](https://en.wikipedia.org/wiki/Percentile). The resulting
+	// data point in each alignment period is the 50th percentile of all data
+	// points in the period. This aligner is valid for `GAUGE` and `DELTA`
+	// metrics with distribution values. The output is a `GAUGE` metric with
+	// `value_type` `DOUBLE`.
 	Aggregation_ALIGN_PERCENTILE_50 Aggregation_Aligner = 20
-	// Align time series via aggregation. The resulting data point in
-	// the alignment period is the 5th percentile of all data
-	// points in the period. This alignment is valid for gauge and delta metrics
-	// with distribution values. The output is a gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Align the time series by using [percentile
+	// aggregation](https://en.wikipedia.org/wiki/Percentile). The resulting
+	// data point in each alignment period is the 5th percentile of all data
+	// points in the period. This aligner is valid for `GAUGE` and `DELTA`
+	// metrics with distribution values. The output is a `GAUGE` metric with
+	// `value_type` `DOUBLE`.
 	Aggregation_ALIGN_PERCENTILE_05 Aggregation_Aligner = 21
-	// Align and convert to a percentage change. This alignment is valid for
-	// gauge and delta metrics with numeric values. This alignment conceptually
-	// computes the equivalent of "((current - previous)/previous)*100"
-	// where previous value is determined based on the alignmentPeriod.
-	// In the event that previous is 0 the calculated value is infinity with the
-	// exception that if both (current - previous) and previous are 0 the
-	// calculated value is 0.
-	// A 10 minute moving mean is computed at each point of the time window
+	// Align and convert to a percentage change. This aligner is valid for
+	// `GAUGE` and `DELTA` metrics with numeric values. This alignment returns
+	// `((current - previous)/previous) * 100`, where the value of `previous` is
+	// determined based on the `alignment_period`.
+	//
+	// If the values of `current` and `previous` are both 0, then the returned
+	// value is 0. If only `previous` is 0, the returned value is infinity.
+	//
+	// A 10-minute moving mean is computed at each point of the alignment period
 	// prior to the above calculation to smooth the metric and prevent false
-	// positives from very short lived spikes.
-	// Only applicable for data that is >= 0. Any values < 0 are treated as
-	// no data. While delta metrics are accepted by this alignment special care
-	// should be taken that the values for the metric will always be positive.
-	// The output is a gauge metric with value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// positives from very short-lived spikes. The moving mean is only
+	// applicable for data whose values are `>= 0`. Any values `< 0` are
+	// treated as a missing datapoint, and are ignored. While `DELTA`
+	// metrics are accepted by this alignment, special care should be taken that
+	// the values for the metric will always be positive. The output is a
+	// `GAUGE` metric with `value_type` `DOUBLE`.
 	Aggregation_ALIGN_PERCENT_CHANGE Aggregation_Aligner = 23
 )
 
@@ -252,80 +258,87 @@
 	return file_google_monitoring_dashboard_v1_common_proto_rawDescGZIP(), []int{0, 0}
 }
 
-// A Reducer describes how to aggregate data points from multiple
-// time series into a single time series.
+// A Reducer operation describes how to aggregate data points from multiple
+// time series into a single time series, where the value of each data point
+// in the resulting series is a function of all the already aligned values in
+// the input time series.
 type Aggregation_Reducer int32
 
 const (
-	// No cross-time series reduction. The output of the aligner is
+	// No cross-time series reduction. The output of the `Aligner` is
 	// returned.
 	Aggregation_REDUCE_NONE Aggregation_Reducer = 0
-	// Reduce by computing the mean across time series for each
-	// alignment period. This reducer is valid for delta and
-	// gauge metrics with numeric or distribution values. The value type of the
-	// output is [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Reduce by computing the mean value across time series for each
+	// alignment period. This reducer is valid for
+	// [DELTA][google.api.MetricDescriptor.MetricKind.DELTA] and
+	// [GAUGE][google.api.MetricDescriptor.MetricKind.GAUGE] metrics with
+	// numeric or distribution values. The `value_type` of the output is
+	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
 	Aggregation_REDUCE_MEAN Aggregation_Reducer = 1
-	// Reduce by computing the minimum across time series for each
-	// alignment period. This reducer is valid for delta and
-	// gauge metrics with numeric values. The value type of the output
-	// is the same as the value type of the input.
+	// Reduce by computing the minimum value across time series for each
+	// alignment period. This reducer is valid for `DELTA` and `GAUGE` metrics
+	// with numeric values. The `value_type` of the output is the same as the
+	// `value_type` of the input.
 	Aggregation_REDUCE_MIN Aggregation_Reducer = 2
-	// Reduce by computing the maximum across time series for each
-	// alignment period. This reducer is valid for delta and
-	// gauge metrics with numeric values. The value type of the output
-	// is the same as the value type of the input.
+	// Reduce by computing the maximum value across time series for each
+	// alignment period. This reducer is valid for `DELTA` and `GAUGE` metrics
+	// with numeric values. The `value_type` of the output is the same as the
+	// `value_type` of the input.
 	Aggregation_REDUCE_MAX Aggregation_Reducer = 3
 	// Reduce by computing the sum across time series for each
-	// alignment period. This reducer is valid for delta and
-	// gauge metrics with numeric and distribution values. The value type of
-	// the output is the same as the value type of the input.
+	// alignment period. This reducer is valid for `DELTA` and `GAUGE` metrics
+	// with numeric and distribution values. The `value_type` of the output is
+	// the same as the `value_type` of the input.
 	Aggregation_REDUCE_SUM Aggregation_Reducer = 4
 	// Reduce by computing the standard deviation across time series
-	// for each alignment period. This reducer is valid for delta
-	// and gauge metrics with numeric or distribution values. The value type of
-	// the output is [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// for each alignment period. This reducer is valid for `DELTA` and
+	// `GAUGE` metrics with numeric or distribution values. The `value_type`
+	// of the output is `DOUBLE`.
 	Aggregation_REDUCE_STDDEV Aggregation_Reducer = 5
-	// Reduce by computing the count of data points across time series
-	// for each alignment period. This reducer is valid for delta
-	// and gauge metrics of numeric, Boolean, distribution, and string value
-	// type. The value type of the output is
-	// [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Reduce by computing the number of data points across time series
+	// for each alignment period. This reducer is valid for `DELTA` and
+	// `GAUGE` metrics of numeric, Boolean, distribution, and string
+	// `value_type`. The `value_type` of the output is `INT64`.
 	Aggregation_REDUCE_COUNT Aggregation_Reducer = 6
-	// Reduce by computing the count of True-valued data points across time
-	// series for each alignment period. This reducer is valid for delta
-	// and gauge metrics of Boolean value type. The value type of
-	// the output is [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Reduce by computing the number of `True`-valued data points across time
+	// series for each alignment period. This reducer is valid for `DELTA` and
+	// `GAUGE` metrics of Boolean `value_type`. The `value_type` of the output
+	// is `INT64`.
 	Aggregation_REDUCE_COUNT_TRUE Aggregation_Reducer = 7
-	// Reduce by computing the count of False-valued data points across time
-	// series for each alignment period. This reducer is valid for delta
-	// and gauge metrics of Boolean value type. The value type of
-	// the output is [INT64][google.api.MetricDescriptor.ValueType.INT64].
+	// Reduce by computing the number of `False`-valued data points across time
+	// series for each alignment period. This reducer is valid for `DELTA` and
+	// `GAUGE` metrics of Boolean `value_type`. The `value_type` of the output
+	// is `INT64`.
 	Aggregation_REDUCE_COUNT_FALSE Aggregation_Reducer = 15
-	// Reduce by computing the fraction of True-valued data points across time
-	// series for each alignment period. This reducer is valid for delta
-	// and gauge metrics of Boolean value type. The output value is in the
-	// range [0, 1] and has value type
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE].
+	// Reduce by computing the ratio of the number of `True`-valued data points
+	// to the total number of data points for each alignment period. This
+	// reducer is valid for `DELTA` and `GAUGE` metrics of Boolean `value_type`.
+	// The output value is in the range [0.0, 1.0] and has `value_type`
+	// `DOUBLE`.
 	Aggregation_REDUCE_FRACTION_TRUE Aggregation_Reducer = 8
-	// Reduce by computing 99th percentile of data points across time series
-	// for each alignment period. This reducer is valid for gauge and delta
-	// metrics of numeric and distribution type. The value of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE]
+	// Reduce by computing the [99th
+	// percentile](https://en.wikipedia.org/wiki/Percentile) of data points
+	// across time series for each alignment period. This reducer is valid for
+	// `GAUGE` and `DELTA` metrics of numeric and distribution type. The value
+	// of the output is `DOUBLE`.
 	Aggregation_REDUCE_PERCENTILE_99 Aggregation_Reducer = 9
-	// Reduce by computing 95th percentile of data points across time series
-	// for each alignment period. This reducer is valid for gauge and delta
-	// metrics of numeric and distribution type. The value of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE]
+	// Reduce by computing the [95th
+	// percentile](https://en.wikipedia.org/wiki/Percentile) of data points
+	// across time series for each alignment period. This reducer is valid for
+	// `GAUGE` and `DELTA` metrics of numeric and distribution type. The value
+	// of the output is `DOUBLE`.
 	Aggregation_REDUCE_PERCENTILE_95 Aggregation_Reducer = 10
-	// Reduce by computing 50th percentile of data points across time series
-	// for each alignment period. This reducer is valid for gauge and delta
-	// metrics of numeric and distribution type. The value of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE]
+	// Reduce by computing the [50th
+	// percentile](https://en.wikipedia.org/wiki/Percentile) of data points
+	// across time series for each alignment period. This reducer is valid for
+	// `GAUGE` and `DELTA` metrics of numeric and distribution type. The value
+	// of the output is `DOUBLE`.
 	Aggregation_REDUCE_PERCENTILE_50 Aggregation_Reducer = 11
-	// Reduce by computing 5th percentile of data points across time series
-	// for each alignment period. This reducer is valid for gauge and delta
-	// metrics of numeric and distribution type. The value of the output is
-	// [DOUBLE][google.api.MetricDescriptor.ValueType.DOUBLE]
+	// Reduce by computing the [5th
+	// percentile](https://en.wikipedia.org/wiki/Percentile) of data points
+	// across time series for each alignment period. This reducer is valid for
+	// `GAUGE` and `DELTA` metrics of numeric and distribution type. The value
+	// of the output is `DOUBLE`.
 	Aggregation_REDUCE_PERCENTILE_05 Aggregation_Reducer = 12
 )
 
@@ -392,11 +405,12 @@
 	return file_google_monitoring_dashboard_v1_common_proto_rawDescGZIP(), []int{0, 1}
 }
 
-// The value reducers that can be applied to a PickTimeSeriesFilter.
+// The value reducers that can be applied to a `PickTimeSeriesFilter`.
 type PickTimeSeriesFilter_Method int32
 
 const (
-	// Not allowed in well-formed requests.
+	// Not allowed. You must specify a different `Method` if you specify a
+	// `PickTimeSeriesFilter`.
 	PickTimeSeriesFilter_METHOD_UNSPECIFIED PickTimeSeriesFilter_Method = 0
 	// Select the mean of all values.
 	PickTimeSeriesFilter_METHOD_MEAN PickTimeSeriesFilter_Method = 1
@@ -461,11 +475,12 @@
 type PickTimeSeriesFilter_Direction int32
 
 const (
-	// Not allowed in well-formed requests.
+	// Not allowed. You must specify a different `Direction` if you specify a
+	// `PickTimeSeriesFilter`.
 	PickTimeSeriesFilter_DIRECTION_UNSPECIFIED PickTimeSeriesFilter_Direction = 0
-	// Pass the highest ranking inputs.
+	// Pass the highest `num_time_series` ranking inputs.
 	PickTimeSeriesFilter_TOP PickTimeSeriesFilter_Direction = 1
-	// Pass the lowest ranking inputs.
+	// Pass the lowest `num_time_series` ranking inputs.
 	PickTimeSeriesFilter_BOTTOM PickTimeSeriesFilter_Direction = 2
 )
 
@@ -559,63 +574,93 @@
 	return file_google_monitoring_dashboard_v1_common_proto_rawDescGZIP(), []int{2, 0}
 }
 
-// Describes how to combine multiple time series to provide different views of
-// the data.  Aggregation consists of an alignment step on individual time
-// series (`alignment_period` and `per_series_aligner`) followed by an optional
-// reduction step of the data across the aligned time series
-// (`cross_series_reducer` and `group_by_fields`).  For more details, see
-// [Aggregation](https://cloud.google.com/monitoring/api/learn_more#aggregation).
+// Describes how to combine multiple time series to provide a different view of
+// the data.  Aggregation of time series is done in two steps. First, each time
+// series in the set is _aligned_ to the same time interval boundaries, then the
+// set of time series is optionally _reduced_ in number.
+//
+// Alignment consists of applying the `per_series_aligner` operation
+// to each time series after its data has been divided into regular
+// `alignment_period` time intervals. This process takes _all_ of the data
+// points in an alignment period, applies a mathematical transformation such as
+// averaging, minimum, maximum, delta, etc., and converts them into a single
+// data point per period.
+//
+// Reduction is when the aligned and transformed time series can optionally be
+// combined, reducing the number of time series through similar mathematical
+// transformations. Reduction involves applying a `cross_series_reducer` to
+// all the time series, optionally sorting the time series into subsets with
+// `group_by_fields`, and applying the reducer to each subset.
+//
+// The raw time series data can contain a huge amount of information from
+// multiple sources. Alignment and reduction transforms this mass of data into
+// a more manageable and representative collection of data, for example "the
+// 95% latency across the average of all tasks in a cluster". This
+// representative data can be more easily graphed and comprehended, and the
+// individual time series data is still available for later drilldown. For more
+// details, see [Filtering and
+// aggregation](https://cloud.google.com/monitoring/api/v3/aggregation).
 type Aggregation struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The alignment period for per-[time series][TimeSeries]
-	// alignment. If present, `alignmentPeriod` must be at least 60
-	// seconds.  After per-time series alignment, each time series will
-	// contain data points only on the period boundaries. If
-	// `perSeriesAligner` is not specified or equals `ALIGN_NONE`, then
-	// this field is ignored. If `perSeriesAligner` is specified and
-	// does not equal `ALIGN_NONE`, then this field must be defined;
-	// otherwise an error is returned.
+	// The `alignment_period` specifies a time interval, in seconds, that is used
+	// to divide the data in all the
+	// [time series][google.monitoring.v3.TimeSeries] into consistent blocks of
+	// time. This will be done before the per-series aligner can be applied to
+	// the data.
+	//
+	// The value must be at least 60 seconds. If a per-series aligner other than
+	// `ALIGN_NONE` is specified, this field is required or an error is returned.
+	// If no per-series aligner is specified, or the aligner `ALIGN_NONE` is
+	// specified, then this field is ignored.
 	AlignmentPeriod *duration.Duration `protobuf:"bytes,1,opt,name=alignment_period,json=alignmentPeriod,proto3" json:"alignment_period,omitempty"`
-	// The approach to be used to align individual time series. Not all
-	// alignment functions may be applied to all time series, depending
-	// on the metric type and value type of the original time
-	// series. Alignment may change the metric type or the value type of
+	// An `Aligner` describes how to bring the data points in a single
+	// time series into temporal alignment. Except for `ALIGN_NONE`, all
+	// alignments cause all the data points in an `alignment_period` to be
+	// mathematically grouped together, resulting in a single data point for
+	// each `alignment_period` with end timestamp at the end of the period.
+	//
+	// Not all alignment operations may be applied to all time series. The valid
+	// choices depend on the `metric_kind` and `value_type` of the original time
+	// series. Alignment can change the `metric_kind` or the `value_type` of
 	// the time series.
 	//
 	// Time series data must be aligned in order to perform cross-time
-	// series reduction. If `crossSeriesReducer` is specified, then
-	// `perSeriesAligner` must be specified and not equal `ALIGN_NONE`
-	// and `alignmentPeriod` must be specified; otherwise, an error is
+	// series reduction. If `cross_series_reducer` is specified, then
+	// `per_series_aligner` must be specified and not equal to `ALIGN_NONE`
+	// and `alignment_period` must be specified; otherwise, an error is
 	// returned.
 	PerSeriesAligner Aggregation_Aligner `protobuf:"varint,2,opt,name=per_series_aligner,json=perSeriesAligner,proto3,enum=google.monitoring.dashboard.v1.Aggregation_Aligner" json:"per_series_aligner,omitempty"`
-	// The approach to be used to combine time series. Not all reducer
-	// functions may be applied to all time series, depending on the
-	// metric type and the value type of the original time
-	// series. Reduction may change the metric type of value type of the
-	// time series.
+	// The reduction operation to be used to combine time series into a single
+	// time series, where the value of each data point in the resulting series is
+	// a function of all the already aligned values in the input time series.
 	//
-	// Time series data must be aligned in order to perform cross-time
-	// series reduction. If `crossSeriesReducer` is specified, then
-	// `perSeriesAligner` must be specified and not equal `ALIGN_NONE`
-	// and `alignmentPeriod` must be specified; otherwise, an error is
-	// returned.
+	// Not all reducer operations can be applied to all time series. The valid
+	// choices depend on the `metric_kind` and the `value_type` of the original
+	// time series. Reduction can yield a time series with a different
+	// `metric_kind` or `value_type` than the input time series.
+	//
+	// Time series data must first be aligned (see `per_series_aligner`) in order
+	// to perform cross-time series reduction. If `cross_series_reducer` is
+	// specified, then `per_series_aligner` must be specified, and must not be
+	// `ALIGN_NONE`. An `alignment_period` must also be specified; otherwise, an
+	// error is returned.
 	CrossSeriesReducer Aggregation_Reducer `protobuf:"varint,4,opt,name=cross_series_reducer,json=crossSeriesReducer,proto3,enum=google.monitoring.dashboard.v1.Aggregation_Reducer" json:"cross_series_reducer,omitempty"`
-	// The set of fields to preserve when `crossSeriesReducer` is
-	// specified. The `groupByFields` determine how the time series are
+	// The set of fields to preserve when `cross_series_reducer` is
+	// specified. The `group_by_fields` determine how the time series are
 	// partitioned into subsets prior to applying the aggregation
-	// function. Each subset contains time series that have the same
+	// operation. Each subset contains time series that have the same
 	// value for each of the grouping fields. Each individual time
 	// series is a member of exactly one subset. The
-	// `crossSeriesReducer` is applied to each subset of time series.
+	// `cross_series_reducer` is applied to each subset of time series.
 	// It is not possible to reduce across different resource types, so
 	// this field implicitly contains `resource.type`.  Fields not
-	// specified in `groupByFields` are aggregated away.  If
-	// `groupByFields` is not specified and all the time series have
+	// specified in `group_by_fields` are aggregated away.  If
+	// `group_by_fields` is not specified and all the time series have
 	// the same resource type, then the time series are aggregated into
-	// a single output time series. If `crossSeriesReducer` is not
+	// a single output time series. If `cross_series_reducer` is not
 	// defined, this field is ignored.
 	GroupByFields []string `protobuf:"bytes,5,rep,name=group_by_fields,json=groupByFields,proto3" json:"group_by_fields,omitempty"`
 }
@@ -681,17 +726,22 @@
 }
 
 // Describes a ranking-based time series filter. Each input time series is
-// ranked with an aligner. The filter lets through up to `num_time_series` time
-// series, selecting them based on the relative ranking.
+// ranked with an aligner. The filter will allow up to `num_time_series` time
+// series to pass through it, selecting them based on the relative ranking.
+//
+// For example, if `ranking_method` is `METHOD_MEAN`,`direction` is `BOTTOM`,
+// and `num_time_series` is 3, then the 3 times series with the lowest mean
+// values will pass through the filter.
 type PickTimeSeriesFilter struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// `rankingMethod` is applied to each time series independently to produce the
-	// value which will be used to compare the time series to other time series.
+	// `ranking_method` is applied to each time series independently to produce
+	// the value which will be used to compare the time series to other time
+	// series.
 	RankingMethod PickTimeSeriesFilter_Method `protobuf:"varint,1,opt,name=ranking_method,json=rankingMethod,proto3,enum=google.monitoring.dashboard.v1.PickTimeSeriesFilter_Method" json:"ranking_method,omitempty"`
-	// How many time series to return.
+	// How many time series to allow to pass through the filter.
 	NumTimeSeries int32 `protobuf:"varint,2,opt,name=num_time_series,json=numTimeSeries,proto3" json:"num_time_series,omitempty"`
 	// How to use the ranking to select time series that pass through the filter.
 	Direction PickTimeSeriesFilter_Direction `protobuf:"varint,3,opt,name=direction,proto3,enum=google.monitoring.dashboard.v1.PickTimeSeriesFilter_Direction" json:"direction,omitempty"`
@@ -752,6 +802,7 @@
 
 // A filter that ranks streams based on their statistical relation to other
 // streams in a request.
+// Note: This field is deprecated and completely ignored by the API.
 type StatisticalTimeSeriesFilter struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
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 }
 
 var (
diff --git a/googleapis/monitoring/dashboard/v1/dashboard.pb.go b/googleapis/monitoring/dashboard/v1/dashboard.pb.go
index a8ce8ca..439af06 100644
--- a/googleapis/monitoring/dashboard/v1/dashboard.pb.go
+++ b/googleapis/monitoring/dashboard/v1/dashboard.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -26,6 +25,7 @@
 	sync "sync"
 
 	proto "github.com/golang/protobuf/proto"
+	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 )
@@ -48,9 +48,9 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The resource name of the dashboard.
+	// Immutable. The resource name of the dashboard.
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
-	// The mutable, human-readable name.
+	// Required. The mutable, human-readable name.
 	DisplayName string `protobuf:"bytes,2,opt,name=display_name,json=displayName,proto3" json:"display_name,omitempty"`
 	// `etag` is used for optimistic concurrency control as a way to help
 	// prevent simultaneous updates of a policy from overwriting each other.
@@ -186,42 +186,52 @@
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 }
 
 var (
diff --git a/googleapis/monitoring/dashboard/v1/dashboards_service.pb.go b/googleapis/monitoring/dashboard/v1/dashboards_service.pb.go
index 52366bf..17ba3dd 100644
--- a/googleapis/monitoring/dashboard/v1/dashboards_service.pb.go
+++ b/googleapis/monitoring/dashboard/v1/dashboards_service.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -54,9 +53,11 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The project on which to execute the request. The format is
-	// `"projects/{project_id_or_number}"`. The {project_id_or_number} must match
-	// the dashboard resource name.
+	// Required. The project on which to execute the request. The format is:
+	//
+	//     projects/[PROJECT_ID_OR_NUMBER]
+	//
+	// The `[PROJECT_ID_OR_NUMBER]` must match the dashboard resource name.
 	Parent string `protobuf:"bytes,1,opt,name=parent,proto3" json:"parent,omitempty"`
 	// Required. The initial dashboard specification.
 	Dashboard *Dashboard `protobuf:"bytes,2,opt,name=dashboard,proto3" json:"dashboard,omitempty"`
@@ -114,8 +115,9 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The scope of the dashboards to list. A project scope must be
-	// specified in the form of `"projects/{project_id_or_number}"`.
+	// Required. The scope of the dashboards to list. The format is:
+	//
+	//     projects/[PROJECT_ID_OR_NUMBER]
 	Parent string `protobuf:"bytes,1,opt,name=parent,proto3" json:"parent,omitempty"`
 	// A positive number that is the maximum number of results to return.
 	// If unspecified, a default of 1000 is used.
@@ -189,7 +191,7 @@
 	Dashboards []*Dashboard `protobuf:"bytes,1,rep,name=dashboards,proto3" json:"dashboards,omitempty"`
 	// If there are more results than have been returned, then this field is set
 	// to a non-empty value.  To see the additional results,
-	// use that value as `pageToken` in the next call to this method.
+	// use that value as `page_token` in the next call to this method.
 	NextPageToken string `protobuf:"bytes,2,opt,name=next_page_token,json=nextPageToken,proto3" json:"next_page_token,omitempty"`
 }
 
@@ -245,10 +247,11 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The resource name of the Dashboard. The format is one of
-	// `"dashboards/{dashboard_id}"` (for system dashboards) or
-	// `"projects/{project_id_or_number}/dashboards/{dashboard_id}"`
-	// (for custom dashboards).
+	// Required. The resource name of the Dashboard. The format is one of:
+	//
+	//  -  `dashboards/[DASHBOARD_ID]` (for system dashboards)
+	//  -  `projects/[PROJECT_ID_OR_NUMBER]/dashboards/[DASHBOARD_ID]`
+	//       (for custom dashboards).
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 }
 
@@ -297,8 +300,9 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The resource name of the Dashboard. The format is
-	// `"projects/{project_id_or_number}/dashboards/{dashboard_id}"`.
+	// Required. The resource name of the Dashboard. The format is:
+	//
+	//     projects/[PROJECT_ID_OR_NUMBER]/dashboards/[DASHBOARD_ID]
 	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
 }
 
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 }
 
 var (
diff --git a/googleapis/monitoring/dashboard/v1/drilldowns.pb.go b/googleapis/monitoring/dashboard/v1/drilldowns.pb.go
index 04a172d..b8b0308 100644
--- a/googleapis/monitoring/dashboard/v1/drilldowns.pb.go
+++ b/googleapis/monitoring/dashboard/v1/drilldowns.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -48,18 +47,21 @@
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+	0x6f, 0x74, 0x6f, 0x33,
 }
 
 var file_google_monitoring_dashboard_v1_drilldowns_proto_goTypes = []interface{}{}
@@ -76,6 +78,7 @@
 	if File_google_monitoring_dashboard_v1_drilldowns_proto != nil {
 		return
 	}
+	file_google_monitoring_dashboard_v1_common_proto_init()
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
diff --git a/googleapis/monitoring/dashboard/v1/layouts.pb.go b/googleapis/monitoring/dashboard/v1/layouts.pb.go
index 7344ead..9b3bb39 100644
--- a/googleapis/monitoring/dashboard/v1/layouts.pb.go
+++ b/googleapis/monitoring/dashboard/v1/layouts.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/monitoring/dashboard/v1/metrics.pb.go b/googleapis/monitoring/dashboard/v1/metrics.pb.go
index 26825d3..a95dec8 100644
--- a/googleapis/monitoring/dashboard/v1/metrics.pb.go
+++ b/googleapis/monitoring/dashboard/v1/metrics.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -218,6 +217,7 @@
 	// Types that are assignable to Source:
 	//	*TimeSeriesQuery_TimeSeriesFilter
 	//	*TimeSeriesQuery_TimeSeriesFilterRatio
+	//	*TimeSeriesQuery_TimeSeriesQueryLanguage
 	Source isTimeSeriesQuery_Source `protobuf_oneof:"source"`
 	// The unit of data contained in fetched time series. If non-empty, this
 	// unit will override any unit that accompanies fetched data. The format is
@@ -280,6 +280,13 @@
 	return nil
 }
 
+func (x *TimeSeriesQuery) GetTimeSeriesQueryLanguage() string {
+	if x, ok := x.GetSource().(*TimeSeriesQuery_TimeSeriesQueryLanguage); ok {
+		return x.TimeSeriesQueryLanguage
+	}
+	return ""
+}
+
 func (x *TimeSeriesQuery) GetUnitOverride() string {
 	if x != nil {
 		return x.UnitOverride
@@ -301,10 +308,17 @@
 	TimeSeriesFilterRatio *TimeSeriesFilterRatio `protobuf:"bytes,2,opt,name=time_series_filter_ratio,json=timeSeriesFilterRatio,proto3,oneof"`
 }
 
+type TimeSeriesQuery_TimeSeriesQueryLanguage struct {
+	// A query used to fetch time series.
+	TimeSeriesQueryLanguage string `protobuf:"bytes,3,opt,name=time_series_query_language,json=timeSeriesQueryLanguage,proto3,oneof"`
+}
+
 func (*TimeSeriesQuery_TimeSeriesFilter) isTimeSeriesQuery_Source() {}
 
 func (*TimeSeriesQuery_TimeSeriesFilterRatio) isTimeSeriesQuery_Source() {}
 
+func (*TimeSeriesQuery_TimeSeriesQueryLanguage) isTimeSeriesQuery_Source() {}
+
 // A filter that defines a subset of time series data that is displayed in a
 // widget. Time series data is fetched using the
 // [`ListTimeSeries`](https://cloud.google.com/monitoring/api/ref_v3/rest/v3/projects.timeSeries/list)
@@ -314,13 +328,15 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The [monitoring filter](https://cloud.google.com/monitoring/api/v3/filters) that identifies the
-	// metric types, resources, and projects to query.
+	// Required. The [monitoring filter](https://cloud.google.com/monitoring/api/v3/filters)
+	// that identifies the metric types, resources, and projects to query.
 	Filter string `protobuf:"bytes,1,opt,name=filter,proto3" json:"filter,omitempty"`
 	// By default, the raw time series data is returned.
 	// Use this field to combine multiple time series for different views of the
 	// data.
 	Aggregation *Aggregation `protobuf:"bytes,2,opt,name=aggregation,proto3" json:"aggregation,omitempty"`
+	// Apply a second aggregation after `aggregation` is applied.
+	SecondaryAggregation *Aggregation `protobuf:"bytes,3,opt,name=secondary_aggregation,json=secondaryAggregation,proto3" json:"secondary_aggregation,omitempty"`
 	// Selects an optional time series filter.
 	//
 	// Types that are assignable to OutputFilter:
@@ -375,6 +391,13 @@
 	return nil
 }
 
+func (x *TimeSeriesFilter) GetSecondaryAggregation() *Aggregation {
+	if x != nil {
+		return x.SecondaryAggregation
+	}
+	return nil
+}
+
 func (m *TimeSeriesFilter) GetOutputFilter() isTimeSeriesFilter_OutputFilter {
 	if m != nil {
 		return m.OutputFilter
@@ -389,6 +412,7 @@
 	return nil
 }
 
+// Deprecated: Do not use.
 func (x *TimeSeriesFilter) GetStatisticalTimeSeriesFilter() *StatisticalTimeSeriesFilter {
 	if x, ok := x.GetOutputFilter().(*TimeSeriesFilter_StatisticalTimeSeriesFilter); ok {
 		return x.StatisticalTimeSeriesFilter
@@ -407,6 +431,9 @@
 
 type TimeSeriesFilter_StatisticalTimeSeriesFilter struct {
 	// Statistics based time series filter.
+	// Note: This field is deprecated and completely ignored by the API.
+	//
+	// Deprecated: Do not use.
 	StatisticalTimeSeriesFilter *StatisticalTimeSeriesFilter `protobuf:"bytes,5,opt,name=statistical_time_series_filter,json=statisticalTimeSeriesFilter,proto3,oneof"`
 }
 
@@ -504,6 +531,7 @@
 	return nil
 }
 
+// Deprecated: Do not use.
 func (x *TimeSeriesFilterRatio) GetStatisticalTimeSeriesFilter() *StatisticalTimeSeriesFilter {
 	if x, ok := x.GetOutputFilter().(*TimeSeriesFilterRatio_StatisticalTimeSeriesFilter); ok {
 		return x.StatisticalTimeSeriesFilter
@@ -522,6 +550,9 @@
 
 type TimeSeriesFilterRatio_StatisticalTimeSeriesFilter struct {
 	// Statistics based time series filter.
+	// Note: This field is deprecated and completely ignored by the API.
+	//
+	// Deprecated: Do not use.
 	StatisticalTimeSeriesFilter *StatisticalTimeSeriesFilter `protobuf:"bytes,5,opt,name=statistical_time_series_filter,json=statisticalTimeSeriesFilter,proto3,oneof"`
 }
 
@@ -614,8 +645,9 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Required. The [monitoring filter](https://cloud.google.com/monitoring/api/v3/filters) that identifies the
-	// metric types, resources, and projects to query.
+	// Required. The [monitoring
+	// filter](https://cloud.google.com/monitoring/api/v3/filters) that
+	// identifies the metric types, resources, and projects to query.
 	Filter string `protobuf:"bytes,1,opt,name=filter,proto3" json:"filter,omitempty"`
 	// By default, the raw time series data is returned.
 	// Use this field to combine multiple time series for different views of the
@@ -681,7 +713,7 @@
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+	0x3a, 0x56, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -838,21 +880,22 @@
 	4,  // 0: google.monitoring.dashboard.v1.TimeSeriesQuery.time_series_filter:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilter
 	5,  // 1: google.monitoring.dashboard.v1.TimeSeriesQuery.time_series_filter_ratio:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilterRatio
 	8,  // 2: google.monitoring.dashboard.v1.TimeSeriesFilter.aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
-	9,  // 3: google.monitoring.dashboard.v1.TimeSeriesFilter.pick_time_series_filter:type_name -> google.monitoring.dashboard.v1.PickTimeSeriesFilter
-	10, // 4: google.monitoring.dashboard.v1.TimeSeriesFilter.statistical_time_series_filter:type_name -> google.monitoring.dashboard.v1.StatisticalTimeSeriesFilter
-	7,  // 5: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.numerator:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart
-	7,  // 6: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.denominator:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart
-	8,  // 7: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.secondary_aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
-	9,  // 8: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.pick_time_series_filter:type_name -> google.monitoring.dashboard.v1.PickTimeSeriesFilter
-	10, // 9: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.statistical_time_series_filter:type_name -> google.monitoring.dashboard.v1.StatisticalTimeSeriesFilter
-	1,  // 10: google.monitoring.dashboard.v1.Threshold.color:type_name -> google.monitoring.dashboard.v1.Threshold.Color
-	2,  // 11: google.monitoring.dashboard.v1.Threshold.direction:type_name -> google.monitoring.dashboard.v1.Threshold.Direction
-	8,  // 12: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart.aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
-	13, // [13:13] is the sub-list for method output_type
-	13, // [13:13] is the sub-list for method input_type
-	13, // [13:13] is the sub-list for extension type_name
-	13, // [13:13] is the sub-list for extension extendee
-	0,  // [0:13] is the sub-list for field type_name
+	8,  // 3: google.monitoring.dashboard.v1.TimeSeriesFilter.secondary_aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
+	9,  // 4: google.monitoring.dashboard.v1.TimeSeriesFilter.pick_time_series_filter:type_name -> google.monitoring.dashboard.v1.PickTimeSeriesFilter
+	10, // 5: google.monitoring.dashboard.v1.TimeSeriesFilter.statistical_time_series_filter:type_name -> google.monitoring.dashboard.v1.StatisticalTimeSeriesFilter
+	7,  // 6: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.numerator:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart
+	7,  // 7: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.denominator:type_name -> google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart
+	8,  // 8: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.secondary_aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
+	9,  // 9: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.pick_time_series_filter:type_name -> google.monitoring.dashboard.v1.PickTimeSeriesFilter
+	10, // 10: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.statistical_time_series_filter:type_name -> google.monitoring.dashboard.v1.StatisticalTimeSeriesFilter
+	1,  // 11: google.monitoring.dashboard.v1.Threshold.color:type_name -> google.monitoring.dashboard.v1.Threshold.Color
+	2,  // 12: google.monitoring.dashboard.v1.Threshold.direction:type_name -> google.monitoring.dashboard.v1.Threshold.Direction
+	8,  // 13: google.monitoring.dashboard.v1.TimeSeriesFilterRatio.RatioPart.aggregation:type_name -> google.monitoring.dashboard.v1.Aggregation
+	14, // [14:14] is the sub-list for method output_type
+	14, // [14:14] is the sub-list for method input_type
+	14, // [14:14] is the sub-list for extension type_name
+	14, // [14:14] is the sub-list for extension extendee
+	0,  // [0:14] is the sub-list for field type_name
 }
 
 func init() { file_google_monitoring_dashboard_v1_metrics_proto_init() }
@@ -926,6 +969,7 @@
 	file_google_monitoring_dashboard_v1_metrics_proto_msgTypes[0].OneofWrappers = []interface{}{
 		(*TimeSeriesQuery_TimeSeriesFilter)(nil),
 		(*TimeSeriesQuery_TimeSeriesFilterRatio)(nil),
+		(*TimeSeriesQuery_TimeSeriesQueryLanguage)(nil),
 	}
 	file_google_monitoring_dashboard_v1_metrics_proto_msgTypes[1].OneofWrappers = []interface{}{
 		(*TimeSeriesFilter_PickTimeSeriesFilter)(nil),
diff --git a/googleapis/monitoring/dashboard/v1/scorecard.pb.go b/googleapis/monitoring/dashboard/v1/scorecard.pb.go
index 8ba91c5..a7e0c73 100644
--- a/googleapis/monitoring/dashboard/v1/scorecard.pb.go
+++ b/googleapis/monitoring/dashboard/v1/scorecard.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -27,6 +26,7 @@
 
 	proto "github.com/golang/protobuf/proto"
 	duration "github.com/golang/protobuf/ptypes/duration"
+	_ "google.golang.org/genproto/googleapis/api/annotations"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 )
@@ -49,7 +49,7 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Fields for querying time series data from the
+	// Required. Fields for querying time series data from the
 	// Stackdriver metrics API.
 	TimeSeriesQuery *TimeSeriesQuery `protobuf:"bytes,1,opt,name=time_series_query,json=timeSeriesQuery,proto3" json:"time_series_query,omitempty"`
 	// Defines the optional additional chart shown on the scorecard. If
@@ -253,7 +253,7 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The type of sparkchart to show in this chartView.
+	// Required. The type of sparkchart to show in this chartView.
 	SparkChartType SparkChartType `protobuf:"varint,1,opt,name=spark_chart_type,json=sparkChartType,proto3,enum=google.monitoring.dashboard.v1.SparkChartType" json:"spark_chart_type,omitempty"`
 	// The lower bound on data point frequency in the chart implemented by
 	// specifying the minimum alignment period to use in a time series query.
@@ -317,63 +317,66 @@
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 }
 
 var (
diff --git a/googleapis/monitoring/dashboard/v1/service.pb.go b/googleapis/monitoring/dashboard/v1/service.pb.go
index f2d7503..0910ad0 100644
--- a/googleapis/monitoring/dashboard/v1/service.pb.go
+++ b/googleapis/monitoring/dashboard/v1/service.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/monitoring/dashboard/v1/text.pb.go b/googleapis/monitoring/dashboard/v1/text.pb.go
index 3b3dd88..0db3f36 100644
--- a/googleapis/monitoring/dashboard/v1/text.pb.go
+++ b/googleapis/monitoring/dashboard/v1/text.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/monitoring/dashboard/v1/widget.pb.go b/googleapis/monitoring/dashboard/v1/widget.pb.go
index dd0d687..dd812ab 100644
--- a/googleapis/monitoring/dashboard/v1/widget.pb.go
+++ b/googleapis/monitoring/dashboard/v1/widget.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
diff --git a/googleapis/monitoring/dashboard/v1/xychart.pb.go b/googleapis/monitoring/dashboard/v1/xychart.pb.go
index d3578a4..51af14d 100644
--- a/googleapis/monitoring/dashboard/v1/xychart.pb.go
+++ b/googleapis/monitoring/dashboard/v1/xychart.pb.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
@@ -232,7 +231,7 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// The data displayed in this chart.
+	// Required. The data displayed in this chart.
 	DataSets []*XyChart_DataSet `protobuf:"bytes,1,rep,name=data_sets,json=dataSets,proto3" json:"data_sets,omitempty"`
 	// The duration used to display a comparison chart. A comparison chart
 	// simultaneously shows values from two similar-length time periods
@@ -379,13 +378,13 @@
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Fields for querying time series data from the
+	// Required. Fields for querying time series data from the
 	// Stackdriver metrics API.
 	TimeSeriesQuery *TimeSeriesQuery `protobuf:"bytes,1,opt,name=time_series_query,json=timeSeriesQuery,proto3" json:"time_series_query,omitempty"`
 	// How this data should be plotted on the chart.
 	PlotType XyChart_DataSet_PlotType `protobuf:"varint,2,opt,name=plot_type,json=plotType,proto3,enum=google.monitoring.dashboard.v1.XyChart_DataSet_PlotType" json:"plot_type,omitempty"`
 	// A template string for naming `TimeSeries` in the resulting data set.
-	// This should be a string with interpolations of the form ${label_name},
+	// This should be a string with interpolations of the form `${label_name}`,
 	// which will resolve to the label's value.
 	LegendTemplate string `protobuf:"bytes,3,opt,name=legend_template,json=legendTemplate,proto3" json:"legend_template,omitempty"`
 	// Optional. The lower bound on data point frequency for this data set, implemented by
@@ -528,92 +527,93 @@
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 var (