diff --git a/googleapis/api/expr/conformance/v1alpha1/conformance_service.pb.go b/googleapis/api/expr/conformance/v1alpha1/conformance_service.pb.go
new file mode 100644
index 0000000..4f52961
--- /dev/null
+++ b/googleapis/api/expr/conformance/v1alpha1/conformance_service.pb.go
@@ -0,0 +1,755 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/api/expr/v1alpha1/conformance_service.proto
+
+package confpb
+
+import (
+	context "context"
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	v1alpha1 "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
+	status "google.golang.org/genproto/googleapis/rpc/status"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status1 "google.golang.org/grpc/status"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Severities of issues.
+type IssueDetails_Severity int32
+
+const (
+	// An unspecified severity.
+	IssueDetails_SEVERITY_UNSPECIFIED IssueDetails_Severity = 0
+	// Deprecation issue for statements and method that may no longer be
+	// supported or maintained.
+	IssueDetails_DEPRECATION IssueDetails_Severity = 1
+	// Warnings such as: unused variables.
+	IssueDetails_WARNING IssueDetails_Severity = 2
+	// Errors such as: unmatched curly braces or variable redefinition.
+	IssueDetails_ERROR IssueDetails_Severity = 3
+)
+
+var IssueDetails_Severity_name = map[int32]string{
+	0: "SEVERITY_UNSPECIFIED",
+	1: "DEPRECATION",
+	2: "WARNING",
+	3: "ERROR",
+}
+
+var IssueDetails_Severity_value = map[string]int32{
+	"SEVERITY_UNSPECIFIED": 0,
+	"DEPRECATION":          1,
+	"WARNING":              2,
+	"ERROR":                3,
+}
+
+func (x IssueDetails_Severity) String() string {
+	return proto.EnumName(IssueDetails_Severity_name, int32(x))
+}
+
+func (IssueDetails_Severity) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{6, 0}
+}
+
+// Request message for the Parse method.
+type ParseRequest struct {
+	// Required. Source text in CEL syntax.
+	CelSource string `protobuf:"bytes,1,opt,name=cel_source,json=celSource,proto3" json:"cel_source,omitempty"`
+	// Tag for version of CEL syntax, for future use.
+	SyntaxVersion string `protobuf:"bytes,2,opt,name=syntax_version,json=syntaxVersion,proto3" json:"syntax_version,omitempty"`
+	// File or resource for source text, used in [SourceInfo][google.api.expr.v1alpha1.SourceInfo].
+	SourceLocation string `protobuf:"bytes,3,opt,name=source_location,json=sourceLocation,proto3" json:"source_location,omitempty"`
+	// Prevent macro expansion.  See "Macros" in Language Defiinition.
+	DisableMacros        bool     `protobuf:"varint,4,opt,name=disable_macros,json=disableMacros,proto3" json:"disable_macros,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ParseRequest) Reset()         { *m = ParseRequest{} }
+func (m *ParseRequest) String() string { return proto.CompactTextString(m) }
+func (*ParseRequest) ProtoMessage()    {}
+func (*ParseRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{0}
+}
+
+func (m *ParseRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ParseRequest.Unmarshal(m, b)
+}
+func (m *ParseRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ParseRequest.Marshal(b, m, deterministic)
+}
+func (m *ParseRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ParseRequest.Merge(m, src)
+}
+func (m *ParseRequest) XXX_Size() int {
+	return xxx_messageInfo_ParseRequest.Size(m)
+}
+func (m *ParseRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ParseRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ParseRequest proto.InternalMessageInfo
+
+func (m *ParseRequest) GetCelSource() string {
+	if m != nil {
+		return m.CelSource
+	}
+	return ""
+}
+
+func (m *ParseRequest) GetSyntaxVersion() string {
+	if m != nil {
+		return m.SyntaxVersion
+	}
+	return ""
+}
+
+func (m *ParseRequest) GetSourceLocation() string {
+	if m != nil {
+		return m.SourceLocation
+	}
+	return ""
+}
+
+func (m *ParseRequest) GetDisableMacros() bool {
+	if m != nil {
+		return m.DisableMacros
+	}
+	return false
+}
+
+// Response message for the Parse method.
+type ParseResponse struct {
+	// The parsed representation, or unset if parsing failed.
+	ParsedExpr *v1alpha1.ParsedExpr `protobuf:"bytes,1,opt,name=parsed_expr,json=parsedExpr,proto3" json:"parsed_expr,omitempty"`
+	// Any number of issues with [StatusDetails][] as the details.
+	Issues               []*status.Status `protobuf:"bytes,2,rep,name=issues,proto3" json:"issues,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *ParseResponse) Reset()         { *m = ParseResponse{} }
+func (m *ParseResponse) String() string { return proto.CompactTextString(m) }
+func (*ParseResponse) ProtoMessage()    {}
+func (*ParseResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{1}
+}
+
+func (m *ParseResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ParseResponse.Unmarshal(m, b)
+}
+func (m *ParseResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ParseResponse.Marshal(b, m, deterministic)
+}
+func (m *ParseResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ParseResponse.Merge(m, src)
+}
+func (m *ParseResponse) XXX_Size() int {
+	return xxx_messageInfo_ParseResponse.Size(m)
+}
+func (m *ParseResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ParseResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ParseResponse proto.InternalMessageInfo
+
+func (m *ParseResponse) GetParsedExpr() *v1alpha1.ParsedExpr {
+	if m != nil {
+		return m.ParsedExpr
+	}
+	return nil
+}
+
+func (m *ParseResponse) GetIssues() []*status.Status {
+	if m != nil {
+		return m.Issues
+	}
+	return nil
+}
+
+// Request message for the Check method.
+type CheckRequest struct {
+	// Required. The parsed representation of the CEL program.
+	ParsedExpr *v1alpha1.ParsedExpr `protobuf:"bytes,1,opt,name=parsed_expr,json=parsedExpr,proto3" json:"parsed_expr,omitempty"`
+	// Declarations of types for external variables and functions.
+	// Required if program uses external variables or functions
+	// not in the default environment.
+	TypeEnv []*v1alpha1.Decl `protobuf:"bytes,2,rep,name=type_env,json=typeEnv,proto3" json:"type_env,omitempty"`
+	// The protocol buffer context.  See "Name Resolution" in the
+	// Language Definition.
+	Container string `protobuf:"bytes,3,opt,name=container,proto3" json:"container,omitempty"`
+	// If true, use only the declarations in [type_env][google.api.expr.v1alpha1.CheckRequest.type_env].  If false (default),
+	// add declarations for the standard definitions to the type environment.  See
+	// "Standard Definitions" in the Language Definition.
+	NoStdEnv             bool     `protobuf:"varint,4,opt,name=no_std_env,json=noStdEnv,proto3" json:"no_std_env,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *CheckRequest) Reset()         { *m = CheckRequest{} }
+func (m *CheckRequest) String() string { return proto.CompactTextString(m) }
+func (*CheckRequest) ProtoMessage()    {}
+func (*CheckRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{2}
+}
+
+func (m *CheckRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CheckRequest.Unmarshal(m, b)
+}
+func (m *CheckRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CheckRequest.Marshal(b, m, deterministic)
+}
+func (m *CheckRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CheckRequest.Merge(m, src)
+}
+func (m *CheckRequest) XXX_Size() int {
+	return xxx_messageInfo_CheckRequest.Size(m)
+}
+func (m *CheckRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_CheckRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CheckRequest proto.InternalMessageInfo
+
+func (m *CheckRequest) GetParsedExpr() *v1alpha1.ParsedExpr {
+	if m != nil {
+		return m.ParsedExpr
+	}
+	return nil
+}
+
+func (m *CheckRequest) GetTypeEnv() []*v1alpha1.Decl {
+	if m != nil {
+		return m.TypeEnv
+	}
+	return nil
+}
+
+func (m *CheckRequest) GetContainer() string {
+	if m != nil {
+		return m.Container
+	}
+	return ""
+}
+
+func (m *CheckRequest) GetNoStdEnv() bool {
+	if m != nil {
+		return m.NoStdEnv
+	}
+	return false
+}
+
+// Response message for the Check method.
+type CheckResponse struct {
+	// The annotated representation, or unset if checking failed.
+	CheckedExpr *v1alpha1.CheckedExpr `protobuf:"bytes,1,opt,name=checked_expr,json=checkedExpr,proto3" json:"checked_expr,omitempty"`
+	// Any number of issues with [StatusDetails][] as the details.
+	Issues               []*status.Status `protobuf:"bytes,2,rep,name=issues,proto3" json:"issues,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *CheckResponse) Reset()         { *m = CheckResponse{} }
+func (m *CheckResponse) String() string { return proto.CompactTextString(m) }
+func (*CheckResponse) ProtoMessage()    {}
+func (*CheckResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{3}
+}
+
+func (m *CheckResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_CheckResponse.Unmarshal(m, b)
+}
+func (m *CheckResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_CheckResponse.Marshal(b, m, deterministic)
+}
+func (m *CheckResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_CheckResponse.Merge(m, src)
+}
+func (m *CheckResponse) XXX_Size() int {
+	return xxx_messageInfo_CheckResponse.Size(m)
+}
+func (m *CheckResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_CheckResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_CheckResponse proto.InternalMessageInfo
+
+func (m *CheckResponse) GetCheckedExpr() *v1alpha1.CheckedExpr {
+	if m != nil {
+		return m.CheckedExpr
+	}
+	return nil
+}
+
+func (m *CheckResponse) GetIssues() []*status.Status {
+	if m != nil {
+		return m.Issues
+	}
+	return nil
+}
+
+// Request message for the Eval method.
+type EvalRequest struct {
+	// Required. Either the parsed or annotated representation of the CEL program.
+	//
+	// Types that are valid to be assigned to ExprKind:
+	//	*EvalRequest_ParsedExpr
+	//	*EvalRequest_CheckedExpr
+	ExprKind isEvalRequest_ExprKind `protobuf_oneof:"expr_kind"`
+	// Bindings for the external variables.  The types SHOULD be compatible
+	// with the type environment in [CheckRequest][google.api.expr.v1alpha1.CheckRequest], if checked.
+	Bindings map[string]*v1alpha1.ExprValue `protobuf:"bytes,3,rep,name=bindings,proto3" json:"bindings,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	// SHOULD be the same container as used in [CheckRequest][google.api.expr.v1alpha1.CheckRequest], if checked.
+	Container            string   `protobuf:"bytes,4,opt,name=container,proto3" json:"container,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *EvalRequest) Reset()         { *m = EvalRequest{} }
+func (m *EvalRequest) String() string { return proto.CompactTextString(m) }
+func (*EvalRequest) ProtoMessage()    {}
+func (*EvalRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{4}
+}
+
+func (m *EvalRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EvalRequest.Unmarshal(m, b)
+}
+func (m *EvalRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EvalRequest.Marshal(b, m, deterministic)
+}
+func (m *EvalRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EvalRequest.Merge(m, src)
+}
+func (m *EvalRequest) XXX_Size() int {
+	return xxx_messageInfo_EvalRequest.Size(m)
+}
+func (m *EvalRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_EvalRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EvalRequest proto.InternalMessageInfo
+
+type isEvalRequest_ExprKind interface {
+	isEvalRequest_ExprKind()
+}
+
+type EvalRequest_ParsedExpr struct {
+	ParsedExpr *v1alpha1.ParsedExpr `protobuf:"bytes,1,opt,name=parsed_expr,json=parsedExpr,proto3,oneof"`
+}
+
+type EvalRequest_CheckedExpr struct {
+	CheckedExpr *v1alpha1.CheckedExpr `protobuf:"bytes,2,opt,name=checked_expr,json=checkedExpr,proto3,oneof"`
+}
+
+func (*EvalRequest_ParsedExpr) isEvalRequest_ExprKind() {}
+
+func (*EvalRequest_CheckedExpr) isEvalRequest_ExprKind() {}
+
+func (m *EvalRequest) GetExprKind() isEvalRequest_ExprKind {
+	if m != nil {
+		return m.ExprKind
+	}
+	return nil
+}
+
+func (m *EvalRequest) GetParsedExpr() *v1alpha1.ParsedExpr {
+	if x, ok := m.GetExprKind().(*EvalRequest_ParsedExpr); ok {
+		return x.ParsedExpr
+	}
+	return nil
+}
+
+func (m *EvalRequest) GetCheckedExpr() *v1alpha1.CheckedExpr {
+	if x, ok := m.GetExprKind().(*EvalRequest_CheckedExpr); ok {
+		return x.CheckedExpr
+	}
+	return nil
+}
+
+func (m *EvalRequest) GetBindings() map[string]*v1alpha1.ExprValue {
+	if m != nil {
+		return m.Bindings
+	}
+	return nil
+}
+
+func (m *EvalRequest) GetContainer() string {
+	if m != nil {
+		return m.Container
+	}
+	return ""
+}
+
+// XXX_OneofWrappers is for the internal use of the proto package.
+func (*EvalRequest) XXX_OneofWrappers() []interface{} {
+	return []interface{}{
+		(*EvalRequest_ParsedExpr)(nil),
+		(*EvalRequest_CheckedExpr)(nil),
+	}
+}
+
+// Response message for the Eval method.
+type EvalResponse struct {
+	// The execution result, or unset if execution couldn't start.
+	Result *v1alpha1.ExprValue `protobuf:"bytes,1,opt,name=result,proto3" json:"result,omitempty"`
+	// Any number of issues with [StatusDetails][] as the details.
+	// Note that CEL execution errors are reified into [ExprValue][google.api.expr.v1alpha1.ExprValue].
+	// Nevertheless, we'll allow out-of-band issues to be raised,
+	// which also makes the replies more regular.
+	Issues               []*status.Status `protobuf:"bytes,2,rep,name=issues,proto3" json:"issues,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
+	XXX_unrecognized     []byte           `json:"-"`
+	XXX_sizecache        int32            `json:"-"`
+}
+
+func (m *EvalResponse) Reset()         { *m = EvalResponse{} }
+func (m *EvalResponse) String() string { return proto.CompactTextString(m) }
+func (*EvalResponse) ProtoMessage()    {}
+func (*EvalResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{5}
+}
+
+func (m *EvalResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_EvalResponse.Unmarshal(m, b)
+}
+func (m *EvalResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_EvalResponse.Marshal(b, m, deterministic)
+}
+func (m *EvalResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_EvalResponse.Merge(m, src)
+}
+func (m *EvalResponse) XXX_Size() int {
+	return xxx_messageInfo_EvalResponse.Size(m)
+}
+func (m *EvalResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_EvalResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_EvalResponse proto.InternalMessageInfo
+
+func (m *EvalResponse) GetResult() *v1alpha1.ExprValue {
+	if m != nil {
+		return m.Result
+	}
+	return nil
+}
+
+func (m *EvalResponse) GetIssues() []*status.Status {
+	if m != nil {
+		return m.Issues
+	}
+	return nil
+}
+
+// Warnings or errors in service execution are represented by
+// [google.rpc.Status][google.rpc.Status] messages, with the following message
+// in the details field.
+type IssueDetails struct {
+	// The severity of the issue.
+	Severity IssueDetails_Severity `protobuf:"varint,1,opt,name=severity,proto3,enum=google.api.expr.v1alpha1.IssueDetails_Severity" json:"severity,omitempty"`
+	// Position in the source, if known.
+	Position *v1alpha1.SourcePosition `protobuf:"bytes,2,opt,name=position,proto3" json:"position,omitempty"`
+	// Expression ID from [Expr][google.api.expr.v1alpha1.Expr], 0 if unknown.
+	Id                   int64    `protobuf:"varint,3,opt,name=id,proto3" json:"id,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *IssueDetails) Reset()         { *m = IssueDetails{} }
+func (m *IssueDetails) String() string { return proto.CompactTextString(m) }
+func (*IssueDetails) ProtoMessage()    {}
+func (*IssueDetails) Descriptor() ([]byte, []int) {
+	return fileDescriptor_b3ca1183e6ceae83, []int{6}
+}
+
+func (m *IssueDetails) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_IssueDetails.Unmarshal(m, b)
+}
+func (m *IssueDetails) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_IssueDetails.Marshal(b, m, deterministic)
+}
+func (m *IssueDetails) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_IssueDetails.Merge(m, src)
+}
+func (m *IssueDetails) XXX_Size() int {
+	return xxx_messageInfo_IssueDetails.Size(m)
+}
+func (m *IssueDetails) XXX_DiscardUnknown() {
+	xxx_messageInfo_IssueDetails.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_IssueDetails proto.InternalMessageInfo
+
+func (m *IssueDetails) GetSeverity() IssueDetails_Severity {
+	if m != nil {
+		return m.Severity
+	}
+	return IssueDetails_SEVERITY_UNSPECIFIED
+}
+
+func (m *IssueDetails) GetPosition() *v1alpha1.SourcePosition {
+	if m != nil {
+		return m.Position
+	}
+	return nil
+}
+
+func (m *IssueDetails) GetId() int64 {
+	if m != nil {
+		return m.Id
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterEnum("google.api.expr.v1alpha1.IssueDetails_Severity", IssueDetails_Severity_name, IssueDetails_Severity_value)
+	proto.RegisterType((*ParseRequest)(nil), "google.api.expr.v1alpha1.ParseRequest")
+	proto.RegisterType((*ParseResponse)(nil), "google.api.expr.v1alpha1.ParseResponse")
+	proto.RegisterType((*CheckRequest)(nil), "google.api.expr.v1alpha1.CheckRequest")
+	proto.RegisterType((*CheckResponse)(nil), "google.api.expr.v1alpha1.CheckResponse")
+	proto.RegisterType((*EvalRequest)(nil), "google.api.expr.v1alpha1.EvalRequest")
+	proto.RegisterMapType((map[string]*v1alpha1.ExprValue)(nil), "google.api.expr.v1alpha1.EvalRequest.BindingsEntry")
+	proto.RegisterType((*EvalResponse)(nil), "google.api.expr.v1alpha1.EvalResponse")
+	proto.RegisterType((*IssueDetails)(nil), "google.api.expr.v1alpha1.IssueDetails")
+}
+
+func init() {
+	proto.RegisterFile("google/api/expr/v1alpha1/conformance_service.proto", fileDescriptor_b3ca1183e6ceae83)
+}
+
+var fileDescriptor_b3ca1183e6ceae83 = []byte{
+	// 815 bytes of a gzipped FileDescriptorProto
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+	0xff, 0x57, 0x07, 0xda, 0xb6, 0x4d, 0x2d, 0x05, 0xd7, 0x14, 0x85, 0xe0, 0xc9, 0xa2, 0x90, 0x44,
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+	0x0c, 0x72, 0xf9, 0x8c, 0xbe, 0x80, 0x2d, 0xa6, 0xf5, 0x9c, 0xea, 0xae, 0xbb, 0x5b, 0x3f, 0xf0,
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+	0xed, 0xd8, 0x4c, 0x8f, 0xa0, 0x65, 0x47, 0x70, 0xd5, 0xd0, 0x5e, 0x75, 0x33, 0x43, 0x83, 0x2e,
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+	0x7c, 0xa1, 0x66, 0xc1, 0x8c, 0xf2, 0x72, 0x03, 0x06, 0xe6, 0x2f, 0x22, 0x99, 0xbe, 0x5e, 0xa2,
+	0x2b, 0x6b, 0x7d, 0xb9, 0x50, 0x5f, 0x14, 0x45, 0x79, 0xf6, 0xb7, 0xe3, 0x9c, 0x6d, 0x95, 0xcc,
+	0x67, 0xff, 0x04, 0x00, 0x00, 0xff, 0xff, 0xd3, 0x1d, 0x1f, 0x52, 0x18, 0x08, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// ConformanceServiceClient is the client API for ConformanceService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type ConformanceServiceClient interface {
+	// Transforms CEL source text into a parsed representation.
+	Parse(ctx context.Context, in *ParseRequest, opts ...grpc.CallOption) (*ParseResponse, error)
+	// Runs static checks on a parsed CEL representation and return
+	// an annotated representation, or a set of issues.
+	Check(ctx context.Context, in *CheckRequest, opts ...grpc.CallOption) (*CheckResponse, error)
+	// Evaluates a parsed or annotation CEL representation given
+	// values of external bindings.
+	Eval(ctx context.Context, in *EvalRequest, opts ...grpc.CallOption) (*EvalResponse, error)
+}
+
+type conformanceServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewConformanceServiceClient(cc grpc.ClientConnInterface) ConformanceServiceClient {
+	return &conformanceServiceClient{cc}
+}
+
+func (c *conformanceServiceClient) Parse(ctx context.Context, in *ParseRequest, opts ...grpc.CallOption) (*ParseResponse, error) {
+	out := new(ParseResponse)
+	err := c.cc.Invoke(ctx, "/google.api.expr.v1alpha1.ConformanceService/Parse", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *conformanceServiceClient) Check(ctx context.Context, in *CheckRequest, opts ...grpc.CallOption) (*CheckResponse, error) {
+	out := new(CheckResponse)
+	err := c.cc.Invoke(ctx, "/google.api.expr.v1alpha1.ConformanceService/Check", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *conformanceServiceClient) Eval(ctx context.Context, in *EvalRequest, opts ...grpc.CallOption) (*EvalResponse, error) {
+	out := new(EvalResponse)
+	err := c.cc.Invoke(ctx, "/google.api.expr.v1alpha1.ConformanceService/Eval", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ConformanceServiceServer is the server API for ConformanceService service.
+type ConformanceServiceServer interface {
+	// Transforms CEL source text into a parsed representation.
+	Parse(context.Context, *ParseRequest) (*ParseResponse, error)
+	// Runs static checks on a parsed CEL representation and return
+	// an annotated representation, or a set of issues.
+	Check(context.Context, *CheckRequest) (*CheckResponse, error)
+	// Evaluates a parsed or annotation CEL representation given
+	// values of external bindings.
+	Eval(context.Context, *EvalRequest) (*EvalResponse, error)
+}
+
+// UnimplementedConformanceServiceServer can be embedded to have forward compatible implementations.
+type UnimplementedConformanceServiceServer struct {
+}
+
+func (*UnimplementedConformanceServiceServer) Parse(ctx context.Context, req *ParseRequest) (*ParseResponse, error) {
+	return nil, status1.Errorf(codes.Unimplemented, "method Parse not implemented")
+}
+func (*UnimplementedConformanceServiceServer) Check(ctx context.Context, req *CheckRequest) (*CheckResponse, error) {
+	return nil, status1.Errorf(codes.Unimplemented, "method Check not implemented")
+}
+func (*UnimplementedConformanceServiceServer) Eval(ctx context.Context, req *EvalRequest) (*EvalResponse, error) {
+	return nil, status1.Errorf(codes.Unimplemented, "method Eval not implemented")
+}
+
+func RegisterConformanceServiceServer(s *grpc.Server, srv ConformanceServiceServer) {
+	s.RegisterService(&_ConformanceService_serviceDesc, srv)
+}
+
+func _ConformanceService_Parse_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ParseRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ConformanceServiceServer).Parse(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.api.expr.v1alpha1.ConformanceService/Parse",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ConformanceServiceServer).Parse(ctx, req.(*ParseRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ConformanceService_Check_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CheckRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ConformanceServiceServer).Check(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.api.expr.v1alpha1.ConformanceService/Check",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ConformanceServiceServer).Check(ctx, req.(*CheckRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _ConformanceService_Eval_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(EvalRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ConformanceServiceServer).Eval(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.api.expr.v1alpha1.ConformanceService/Eval",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ConformanceServiceServer).Eval(ctx, req.(*EvalRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _ConformanceService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "google.api.expr.v1alpha1.ConformanceService",
+	HandlerType: (*ConformanceServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Parse",
+			Handler:    _ConformanceService_Parse_Handler,
+		},
+		{
+			MethodName: "Check",
+			Handler:    _ConformanceService_Check_Handler,
+		},
+		{
+			MethodName: "Eval",
+			Handler:    _ConformanceService_Eval_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "google/api/expr/v1alpha1/conformance_service.proto",
+}
diff --git a/googleapis/cloud/bigquery/reservation/v1beta1/reservation.pb.go b/googleapis/cloud/bigquery/reservation/v1beta1/reservation.pb.go
index 1944b19..9db4448 100644
--- a/googleapis/cloud/bigquery/reservation/v1beta1/reservation.pb.go
+++ b/googleapis/cloud/bigquery/reservation/v1beta1/reservation.pb.go
@@ -1663,7 +1663,7 @@
 // A request to update a BI reservation.
 type UpdateBiReservationRequest struct {
 	// A reservation to update.
-	Reservation *BiReservation `protobuf:"bytes,1,opt,name=reservation,proto3" json:"reservation,omitempty"`
+	BiReservation *BiReservation `protobuf:"bytes,1,opt,name=bi_reservation,json=biReservation,proto3" json:"bi_reservation,omitempty"`
 	// A list of fields to be updated in this request.
 	UpdateMask           *field_mask.FieldMask `protobuf:"bytes,2,opt,name=update_mask,json=updateMask,proto3" json:"update_mask,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}              `json:"-"`
@@ -1696,9 +1696,9 @@
 
 var xxx_messageInfo_UpdateBiReservationRequest proto.InternalMessageInfo
 
-func (m *UpdateBiReservationRequest) GetReservation() *BiReservation {
+func (m *UpdateBiReservationRequest) GetBiReservation() *BiReservation {
 	if m != nil {
-		return m.Reservation
+		return m.BiReservation
 	}
 	return nil
 }
@@ -1749,150 +1749,151 @@
 }
 
 var fileDescriptor_8b47fa8b6617477f = []byte{
-	// 2282 bytes of a gzipped FileDescriptorProto
+	// 2291 bytes of a gzipped FileDescriptorProto
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/googleapis/cloud/dialogflow/v2/environment.pb.go b/googleapis/cloud/dialogflow/v2/environment.pb.go
new file mode 100644
index 0000000..5e66303
--- /dev/null
+++ b/googleapis/cloud/dialogflow/v2/environment.pb.go
@@ -0,0 +1,409 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/cloud/dialogflow/v2/environment.proto
+
+package dialogflow
+
+import (
+	context "context"
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	_ "github.com/golang/protobuf/ptypes/empty"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	_ "google.golang.org/genproto/googleapis/api/annotations"
+	_ "google.golang.org/genproto/protobuf/field_mask"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Represents an environment state. When a environment is pointed to a new
+// agent version, the environment is temporarily set to the `LOADING` state.
+// During that time, the environment keeps on serving the previous version of
+// the agent. After the new agent version is done loading, the environment is
+// set back to the `RUNNING` state.
+type Environment_State int32
+
+const (
+	// Not specified. This value is not used.
+	Environment_STATE_UNSPECIFIED Environment_State = 0
+	// Stopped.
+	Environment_STOPPED Environment_State = 1
+	// Loading.
+	Environment_LOADING Environment_State = 2
+	// Running.
+	Environment_RUNNING Environment_State = 3
+)
+
+var Environment_State_name = map[int32]string{
+	0: "STATE_UNSPECIFIED",
+	1: "STOPPED",
+	2: "LOADING",
+	3: "RUNNING",
+}
+
+var Environment_State_value = map[string]int32{
+	"STATE_UNSPECIFIED": 0,
+	"STOPPED":           1,
+	"LOADING":           2,
+	"RUNNING":           3,
+}
+
+func (x Environment_State) String() string {
+	return proto.EnumName(Environment_State_name, int32(x))
+}
+
+func (Environment_State) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_e1eda8d735fabace, []int{0, 0}
+}
+
+// Represents an agent environment.
+type Environment struct {
+	// Output only. The unique identifier of this agent environment.
+	// Format: `projects/<Project ID>/agent/environments/<Environment ID>`.
+	// For Environment ID, "-" is reserved for 'draft' environment.
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// Optional. The developer-provided description for this environment.
+	// The maximum length is 500 characters. If exceeded, the request is rejected.
+	Description string `protobuf:"bytes,2,opt,name=description,proto3" json:"description,omitempty"`
+	// Optional. The agent version loaded into this environment.
+	// Format: `projects/<Project ID>/agent/versions/<Version ID>`.
+	AgentVersion string `protobuf:"bytes,3,opt,name=agent_version,json=agentVersion,proto3" json:"agent_version,omitempty"`
+	// Output only. The state of this environment. This field is read-only, i.e., it cannot be
+	// set by create and update methods.
+	State Environment_State `protobuf:"varint,4,opt,name=state,proto3,enum=google.cloud.dialogflow.v2.Environment_State" json:"state,omitempty"`
+	// Output only. The last update time of this environment. This field is read-only, i.e., it
+	// cannot be set by create and update methods.
+	UpdateTime           *timestamp.Timestamp `protobuf:"bytes,5,opt,name=update_time,json=updateTime,proto3" json:"update_time,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *Environment) Reset()         { *m = Environment{} }
+func (m *Environment) String() string { return proto.CompactTextString(m) }
+func (*Environment) ProtoMessage()    {}
+func (*Environment) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1eda8d735fabace, []int{0}
+}
+
+func (m *Environment) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Environment.Unmarshal(m, b)
+}
+func (m *Environment) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Environment.Marshal(b, m, deterministic)
+}
+func (m *Environment) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Environment.Merge(m, src)
+}
+func (m *Environment) XXX_Size() int {
+	return xxx_messageInfo_Environment.Size(m)
+}
+func (m *Environment) XXX_DiscardUnknown() {
+	xxx_messageInfo_Environment.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Environment proto.InternalMessageInfo
+
+func (m *Environment) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *Environment) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+func (m *Environment) GetAgentVersion() string {
+	if m != nil {
+		return m.AgentVersion
+	}
+	return ""
+}
+
+func (m *Environment) GetState() Environment_State {
+	if m != nil {
+		return m.State
+	}
+	return Environment_STATE_UNSPECIFIED
+}
+
+func (m *Environment) GetUpdateTime() *timestamp.Timestamp {
+	if m != nil {
+		return m.UpdateTime
+	}
+	return nil
+}
+
+// The request message for [Environments.ListEnvironments][google.cloud.dialogflow.v2.Environments.ListEnvironments].
+type ListEnvironmentsRequest struct {
+	// Required. The agent to list all environments from.
+	// Format: `projects/<Project ID>/agent`.
+	Parent string `protobuf:"bytes,1,opt,name=parent,proto3" json:"parent,omitempty"`
+	// Optional. The maximum number of items to return in a single page. By default 100 and
+	// at most 1000.
+	PageSize int32 `protobuf:"varint,2,opt,name=page_size,json=pageSize,proto3" json:"page_size,omitempty"`
+	// Optional. The next_page_token value returned from a previous list request.
+	PageToken            string   `protobuf:"bytes,3,opt,name=page_token,json=pageToken,proto3" json:"page_token,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ListEnvironmentsRequest) Reset()         { *m = ListEnvironmentsRequest{} }
+func (m *ListEnvironmentsRequest) String() string { return proto.CompactTextString(m) }
+func (*ListEnvironmentsRequest) ProtoMessage()    {}
+func (*ListEnvironmentsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1eda8d735fabace, []int{1}
+}
+
+func (m *ListEnvironmentsRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListEnvironmentsRequest.Unmarshal(m, b)
+}
+func (m *ListEnvironmentsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListEnvironmentsRequest.Marshal(b, m, deterministic)
+}
+func (m *ListEnvironmentsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListEnvironmentsRequest.Merge(m, src)
+}
+func (m *ListEnvironmentsRequest) XXX_Size() int {
+	return xxx_messageInfo_ListEnvironmentsRequest.Size(m)
+}
+func (m *ListEnvironmentsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListEnvironmentsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListEnvironmentsRequest proto.InternalMessageInfo
+
+func (m *ListEnvironmentsRequest) GetParent() string {
+	if m != nil {
+		return m.Parent
+	}
+	return ""
+}
+
+func (m *ListEnvironmentsRequest) GetPageSize() int32 {
+	if m != nil {
+		return m.PageSize
+	}
+	return 0
+}
+
+func (m *ListEnvironmentsRequest) GetPageToken() string {
+	if m != nil {
+		return m.PageToken
+	}
+	return ""
+}
+
+// The response message for [Environments.ListEnvironments][google.cloud.dialogflow.v2.Environments.ListEnvironments].
+type ListEnvironmentsResponse struct {
+	// The list of agent environments. There will be a maximum number of items
+	// returned based on the page_size field in the request.
+	Environments []*Environment `protobuf:"bytes,1,rep,name=environments,proto3" json:"environments,omitempty"`
+	// Token to retrieve the next page of results, or empty if there are no
+	// more results in the list.
+	NextPageToken        string   `protobuf:"bytes,2,opt,name=next_page_token,json=nextPageToken,proto3" json:"next_page_token,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ListEnvironmentsResponse) Reset()         { *m = ListEnvironmentsResponse{} }
+func (m *ListEnvironmentsResponse) String() string { return proto.CompactTextString(m) }
+func (*ListEnvironmentsResponse) ProtoMessage()    {}
+func (*ListEnvironmentsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1eda8d735fabace, []int{2}
+}
+
+func (m *ListEnvironmentsResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListEnvironmentsResponse.Unmarshal(m, b)
+}
+func (m *ListEnvironmentsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListEnvironmentsResponse.Marshal(b, m, deterministic)
+}
+func (m *ListEnvironmentsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListEnvironmentsResponse.Merge(m, src)
+}
+func (m *ListEnvironmentsResponse) XXX_Size() int {
+	return xxx_messageInfo_ListEnvironmentsResponse.Size(m)
+}
+func (m *ListEnvironmentsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListEnvironmentsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListEnvironmentsResponse proto.InternalMessageInfo
+
+func (m *ListEnvironmentsResponse) GetEnvironments() []*Environment {
+	if m != nil {
+		return m.Environments
+	}
+	return nil
+}
+
+func (m *ListEnvironmentsResponse) GetNextPageToken() string {
+	if m != nil {
+		return m.NextPageToken
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterEnum("google.cloud.dialogflow.v2.Environment_State", Environment_State_name, Environment_State_value)
+	proto.RegisterType((*Environment)(nil), "google.cloud.dialogflow.v2.Environment")
+	proto.RegisterType((*ListEnvironmentsRequest)(nil), "google.cloud.dialogflow.v2.ListEnvironmentsRequest")
+	proto.RegisterType((*ListEnvironmentsResponse)(nil), "google.cloud.dialogflow.v2.ListEnvironmentsResponse")
+}
+
+func init() {
+	proto.RegisterFile("google/cloud/dialogflow/v2/environment.proto", fileDescriptor_e1eda8d735fabace)
+}
+
+var fileDescriptor_e1eda8d735fabace = []byte{
+	// 727 bytes of a gzipped FileDescriptorProto
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+	0xbe, 0x03, 0xf0, 0x46, 0xd3, 0xaa, 0x2b, 0xef, 0xb4, 0xe2, 0xaa, 0x2c, 0xb7, 0x1c, 0xb7, 0xaf,
+	0xa6, 0xed, 0xb7, 0x8c, 0xed, 0xd1, 0xb8, 0xea, 0xc2, 0xcf, 0x00, 0x00, 0x00, 0xff, 0xff, 0xd8,
+	0x27, 0xcc, 0xe4, 0xef, 0x05, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// EnvironmentsClient is the client API for Environments service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type EnvironmentsClient interface {
+	// Returns the list of all non-draft environments of the specified agent.
+	ListEnvironments(ctx context.Context, in *ListEnvironmentsRequest, opts ...grpc.CallOption) (*ListEnvironmentsResponse, error)
+}
+
+type environmentsClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewEnvironmentsClient(cc grpc.ClientConnInterface) EnvironmentsClient {
+	return &environmentsClient{cc}
+}
+
+func (c *environmentsClient) ListEnvironments(ctx context.Context, in *ListEnvironmentsRequest, opts ...grpc.CallOption) (*ListEnvironmentsResponse, error) {
+	out := new(ListEnvironmentsResponse)
+	err := c.cc.Invoke(ctx, "/google.cloud.dialogflow.v2.Environments/ListEnvironments", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// EnvironmentsServer is the server API for Environments service.
+type EnvironmentsServer interface {
+	// Returns the list of all non-draft environments of the specified agent.
+	ListEnvironments(context.Context, *ListEnvironmentsRequest) (*ListEnvironmentsResponse, error)
+}
+
+// UnimplementedEnvironmentsServer can be embedded to have forward compatible implementations.
+type UnimplementedEnvironmentsServer struct {
+}
+
+func (*UnimplementedEnvironmentsServer) ListEnvironments(ctx context.Context, req *ListEnvironmentsRequest) (*ListEnvironmentsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListEnvironments not implemented")
+}
+
+func RegisterEnvironmentsServer(s *grpc.Server, srv EnvironmentsServer) {
+	s.RegisterService(&_Environments_serviceDesc, srv)
+}
+
+func _Environments_ListEnvironments_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListEnvironmentsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(EnvironmentsServer).ListEnvironments(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.cloud.dialogflow.v2.Environments/ListEnvironments",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(EnvironmentsServer).ListEnvironments(ctx, req.(*ListEnvironmentsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Environments_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "google.cloud.dialogflow.v2.Environments",
+	HandlerType: (*EnvironmentsServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "ListEnvironments",
+			Handler:    _Environments_ListEnvironments_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "google/cloud/dialogflow/v2/environment.proto",
+}
diff --git a/googleapis/cloud/dialogflow/v2/webhook.pb.go b/googleapis/cloud/dialogflow/v2/webhook.pb.go
index 5bfa790..daadeea 100644
--- a/googleapis/cloud/dialogflow/v2/webhook.pb.go
+++ b/googleapis/cloud/dialogflow/v2/webhook.pb.go
@@ -113,18 +113,24 @@
 // [Protocol Buffers Language
 // Guide](https://developers.google.com/protocol-buffers/docs/proto3#json).
 type WebhookResponse struct {
-	// Optional. The text to be shown on the screen. This value is passed directly
-	// to `QueryResult.fulfillment_text`.
-	FulfillmentText string `protobuf:"bytes,1,opt,name=fulfillment_text,json=fulfillmentText,proto3" json:"fulfillment_text,omitempty"`
-	// Optional. The collection of rich messages to present to the user. This
-	// value is passed directly to `QueryResult.fulfillment_messages`.
-	FulfillmentMessages []*Intent_Message `protobuf:"bytes,2,rep,name=fulfillment_messages,json=fulfillmentMessages,proto3" json:"fulfillment_messages,omitempty"`
-	// Optional. This value is passed directly to `QueryResult.webhook_source`.
-	Source string `protobuf:"bytes,3,opt,name=source,proto3" json:"source,omitempty"`
-	// Optional. This field can be used to pass custom data from your webhook to the API
-	// caller. Arbitrary JSON objects are supported.
+	// Optional. The text response message intended for the end-user.
+	// It is recommended to use `fulfillment_messages.text.text[0]` instead.
 	// When provided, Dialogflow uses this field to populate
-	// `QueryResult.webhook_payload` sent to the API caller.
+	// [QueryResult.fulfillment_text][google.cloud.dialogflow.v2.QueryResult.fulfillment_text] sent to the integration or API caller.
+	FulfillmentText string `protobuf:"bytes,1,opt,name=fulfillment_text,json=fulfillmentText,proto3" json:"fulfillment_text,omitempty"`
+	// Optional. The rich response messages intended for the end-user.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.fulfillment_messages][google.cloud.dialogflow.v2.QueryResult.fulfillment_messages] sent to the integration or API caller.
+	FulfillmentMessages []*Intent_Message `protobuf:"bytes,2,rep,name=fulfillment_messages,json=fulfillmentMessages,proto3" json:"fulfillment_messages,omitempty"`
+	// Optional. A custom field used to identify the webhook source.
+	// Arbitrary strings are supported.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.webhook_source][google.cloud.dialogflow.v2.QueryResult.webhook_source] sent to the integration or API caller.
+	Source string `protobuf:"bytes,3,opt,name=source,proto3" json:"source,omitempty"`
+	// Optional. This field can be used to pass custom data from your webhook to the
+	// integration or API caller. Arbitrary JSON objects are supported.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.webhook_payload][google.cloud.dialogflow.v2.QueryResult.webhook_payload] sent to the integration or API caller.
 	// This field is also used by the
 	// [Google Assistant
 	// integration](https://cloud.google.com/dialogflow/docs/integrations/aog)
@@ -132,19 +138,20 @@
 	// See the format definition at [Google Assistant Dialogflow webhook
 	// format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
 	Payload *_struct.Struct `protobuf:"bytes,4,opt,name=payload,proto3" json:"payload,omitempty"`
-	// Optional. The collection of output contexts. This value is passed directly
-	// to `QueryResult.output_contexts`.
+	// Optional. The collection of output contexts that will overwrite currently
+	// active contexts for the session and reset their lifespans.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.output_contexts][google.cloud.dialogflow.v2.QueryResult.output_contexts] sent to the integration or API caller.
 	OutputContexts []*Context `protobuf:"bytes,5,rep,name=output_contexts,json=outputContexts,proto3" json:"output_contexts,omitempty"`
-	// Optional. Makes the platform immediately invoke another `DetectIntent` call
-	// internally with the specified event as input.
+	// Optional. Invokes the supplied events.
 	// When this field is set, Dialogflow ignores the `fulfillment_text`,
 	// `fulfillment_messages`, and `payload` fields.
 	FollowupEventInput *EventInput `protobuf:"bytes,6,opt,name=followup_event_input,json=followupEventInput,proto3" json:"followup_event_input,omitempty"`
 	// Optional. Additional session entity types to replace or extend developer
 	// entity types with. The entity synonyms apply to all languages and persist
-	// for the session of this query. Setting the session entity types inside
-	// webhook overwrites the session entity types that have been set through
-	// `DetectIntentRequest.query_params.session_entity_types`.
+	// for the session. Setting this data from a webhook overwrites
+	// the session entity types that have been set using `detectIntent`,
+	// `streamingDetectIntent` or [SessionEntityType][google.cloud.dialogflow.v2.SessionEntityType] management methods.
 	SessionEntityTypes   []*SessionEntityType `protobuf:"bytes,10,rep,name=session_entity_types,json=sessionEntityTypes,proto3" json:"session_entity_types,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
 	XXX_unrecognized     []byte               `json:"-"`
diff --git a/googleapis/cloud/dialogflow/v2beta1/agent.pb.go b/googleapis/cloud/dialogflow/v2beta1/agent.pb.go
index f5df590..fdfb90a 100644
--- a/googleapis/cloud/dialogflow/v2beta1/agent.pb.go
+++ b/googleapis/cloud/dialogflow/v2beta1/agent.pb.go
@@ -1042,102 +1042,102 @@
 }
 
 var fileDescriptor_be44838675479699 = []byte{
-	// 1510 bytes of a gzipped FileDescriptorProto
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 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/googleapis/cloud/dialogflow/v2beta1/environment.pb.go b/googleapis/cloud/dialogflow/v2beta1/environment.pb.go
new file mode 100644
index 0000000..c241717
--- /dev/null
+++ b/googleapis/cloud/dialogflow/v2beta1/environment.pb.go
@@ -0,0 +1,412 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: google/cloud/dialogflow/v2beta1/environment.proto
+
+package dialogflow
+
+import (
+	context "context"
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	_ "github.com/golang/protobuf/ptypes/empty"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	_ "google.golang.org/genproto/googleapis/api/annotations"
+	_ "google.golang.org/genproto/protobuf/field_mask"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Represents an environment state. When a environment is pointed to a new
+// agent version, the environment is temporarily set to the `LOADING` state.
+// During that time, the environment keeps on serving the previous version of
+// the agent. After the new agent version is done loading, the environment is
+// set back to the `RUNNING` state.
+type Environment_State int32
+
+const (
+	// Not specified. This value is not used.
+	Environment_STATE_UNSPECIFIED Environment_State = 0
+	// Stopped.
+	Environment_STOPPED Environment_State = 1
+	// Loading.
+	Environment_LOADING Environment_State = 2
+	// Running.
+	Environment_RUNNING Environment_State = 3
+)
+
+var Environment_State_name = map[int32]string{
+	0: "STATE_UNSPECIFIED",
+	1: "STOPPED",
+	2: "LOADING",
+	3: "RUNNING",
+}
+
+var Environment_State_value = map[string]int32{
+	"STATE_UNSPECIFIED": 0,
+	"STOPPED":           1,
+	"LOADING":           2,
+	"RUNNING":           3,
+}
+
+func (x Environment_State) String() string {
+	return proto.EnumName(Environment_State_name, int32(x))
+}
+
+func (Environment_State) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_f690af77cb8ebc0e, []int{0, 0}
+}
+
+// Represents an agent environment.
+type Environment struct {
+	// Output only. The unique identifier of this agent environment.
+	// Format: `projects/<Project ID>/agent/environments/<Environment ID>`.
+	// For Environment ID, "-" is reserved for 'draft' environment.
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	// Optional. The developer-provided description for this environment.
+	// The maximum length is 500 characters. If exceeded, the request is rejected.
+	Description string `protobuf:"bytes,2,opt,name=description,proto3" json:"description,omitempty"`
+	// Optional. The agent version loaded into this environment.
+	// Format: `projects/<Project ID>/agent/versions/<Version ID>`.
+	AgentVersion string `protobuf:"bytes,3,opt,name=agent_version,json=agentVersion,proto3" json:"agent_version,omitempty"`
+	// Output only. The state of this environment. This field is read-only, i.e., it cannot be
+	// set by create and update methods.
+	State Environment_State `protobuf:"varint,4,opt,name=state,proto3,enum=google.cloud.dialogflow.v2beta1.Environment_State" json:"state,omitempty"`
+	// Output only. The last update time of this environment. This field is read-only, i.e., it
+	// cannot be set by create and update methods.
+	UpdateTime           *timestamp.Timestamp `protobuf:"bytes,5,opt,name=update_time,json=updateTime,proto3" json:"update_time,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
+	XXX_unrecognized     []byte               `json:"-"`
+	XXX_sizecache        int32                `json:"-"`
+}
+
+func (m *Environment) Reset()         { *m = Environment{} }
+func (m *Environment) String() string { return proto.CompactTextString(m) }
+func (*Environment) ProtoMessage()    {}
+func (*Environment) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f690af77cb8ebc0e, []int{0}
+}
+
+func (m *Environment) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Environment.Unmarshal(m, b)
+}
+func (m *Environment) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Environment.Marshal(b, m, deterministic)
+}
+func (m *Environment) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Environment.Merge(m, src)
+}
+func (m *Environment) XXX_Size() int {
+	return xxx_messageInfo_Environment.Size(m)
+}
+func (m *Environment) XXX_DiscardUnknown() {
+	xxx_messageInfo_Environment.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Environment proto.InternalMessageInfo
+
+func (m *Environment) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+func (m *Environment) GetDescription() string {
+	if m != nil {
+		return m.Description
+	}
+	return ""
+}
+
+func (m *Environment) GetAgentVersion() string {
+	if m != nil {
+		return m.AgentVersion
+	}
+	return ""
+}
+
+func (m *Environment) GetState() Environment_State {
+	if m != nil {
+		return m.State
+	}
+	return Environment_STATE_UNSPECIFIED
+}
+
+func (m *Environment) GetUpdateTime() *timestamp.Timestamp {
+	if m != nil {
+		return m.UpdateTime
+	}
+	return nil
+}
+
+// The request message for [Environments.ListEnvironments][google.cloud.dialogflow.v2beta1.Environments.ListEnvironments].
+type ListEnvironmentsRequest struct {
+	// Required. The agent to list all environments from.
+	// Format: `projects/<Project ID>/agent`.
+	Parent string `protobuf:"bytes,1,opt,name=parent,proto3" json:"parent,omitempty"`
+	// Optional. The maximum number of items to return in a single page. By default 100 and
+	// at most 1000.
+	PageSize int32 `protobuf:"varint,2,opt,name=page_size,json=pageSize,proto3" json:"page_size,omitempty"`
+	// Optional. The next_page_token value returned from a previous list request.
+	PageToken            string   `protobuf:"bytes,3,opt,name=page_token,json=pageToken,proto3" json:"page_token,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ListEnvironmentsRequest) Reset()         { *m = ListEnvironmentsRequest{} }
+func (m *ListEnvironmentsRequest) String() string { return proto.CompactTextString(m) }
+func (*ListEnvironmentsRequest) ProtoMessage()    {}
+func (*ListEnvironmentsRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f690af77cb8ebc0e, []int{1}
+}
+
+func (m *ListEnvironmentsRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListEnvironmentsRequest.Unmarshal(m, b)
+}
+func (m *ListEnvironmentsRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListEnvironmentsRequest.Marshal(b, m, deterministic)
+}
+func (m *ListEnvironmentsRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListEnvironmentsRequest.Merge(m, src)
+}
+func (m *ListEnvironmentsRequest) XXX_Size() int {
+	return xxx_messageInfo_ListEnvironmentsRequest.Size(m)
+}
+func (m *ListEnvironmentsRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListEnvironmentsRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListEnvironmentsRequest proto.InternalMessageInfo
+
+func (m *ListEnvironmentsRequest) GetParent() string {
+	if m != nil {
+		return m.Parent
+	}
+	return ""
+}
+
+func (m *ListEnvironmentsRequest) GetPageSize() int32 {
+	if m != nil {
+		return m.PageSize
+	}
+	return 0
+}
+
+func (m *ListEnvironmentsRequest) GetPageToken() string {
+	if m != nil {
+		return m.PageToken
+	}
+	return ""
+}
+
+// The response message for [Environments.ListEnvironments][google.cloud.dialogflow.v2beta1.Environments.ListEnvironments].
+type ListEnvironmentsResponse struct {
+	// The list of agent environments. There will be a maximum number of items
+	// returned based on the page_size field in the request.
+	Environments []*Environment `protobuf:"bytes,1,rep,name=environments,proto3" json:"environments,omitempty"`
+	// Token to retrieve the next page of results, or empty if there are no
+	// more results in the list.
+	NextPageToken        string   `protobuf:"bytes,2,opt,name=next_page_token,json=nextPageToken,proto3" json:"next_page_token,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ListEnvironmentsResponse) Reset()         { *m = ListEnvironmentsResponse{} }
+func (m *ListEnvironmentsResponse) String() string { return proto.CompactTextString(m) }
+func (*ListEnvironmentsResponse) ProtoMessage()    {}
+func (*ListEnvironmentsResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_f690af77cb8ebc0e, []int{2}
+}
+
+func (m *ListEnvironmentsResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ListEnvironmentsResponse.Unmarshal(m, b)
+}
+func (m *ListEnvironmentsResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ListEnvironmentsResponse.Marshal(b, m, deterministic)
+}
+func (m *ListEnvironmentsResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ListEnvironmentsResponse.Merge(m, src)
+}
+func (m *ListEnvironmentsResponse) XXX_Size() int {
+	return xxx_messageInfo_ListEnvironmentsResponse.Size(m)
+}
+func (m *ListEnvironmentsResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_ListEnvironmentsResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ListEnvironmentsResponse proto.InternalMessageInfo
+
+func (m *ListEnvironmentsResponse) GetEnvironments() []*Environment {
+	if m != nil {
+		return m.Environments
+	}
+	return nil
+}
+
+func (m *ListEnvironmentsResponse) GetNextPageToken() string {
+	if m != nil {
+		return m.NextPageToken
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterEnum("google.cloud.dialogflow.v2beta1.Environment_State", Environment_State_name, Environment_State_value)
+	proto.RegisterType((*Environment)(nil), "google.cloud.dialogflow.v2beta1.Environment")
+	proto.RegisterType((*ListEnvironmentsRequest)(nil), "google.cloud.dialogflow.v2beta1.ListEnvironmentsRequest")
+	proto.RegisterType((*ListEnvironmentsResponse)(nil), "google.cloud.dialogflow.v2beta1.ListEnvironmentsResponse")
+}
+
+func init() {
+	proto.RegisterFile("google/cloud/dialogflow/v2beta1/environment.proto", fileDescriptor_f690af77cb8ebc0e)
+}
+
+var fileDescriptor_f690af77cb8ebc0e = []byte{
+	// 769 bytes of a gzipped FileDescriptorProto
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+	0x4f, 0x3c, 0x88, 0xf3, 0x9e, 0x8d, 0x58, 0x8b, 0xf8, 0xce, 0xdc, 0xb0, 0xf6, 0xfe, 0xaf, 0x56,
+	0x3f, 0x48, 0x60, 0xc6, 0x20, 0xce, 0x30, 0xc9, 0x56, 0x53, 0x11, 0xbd, 0xaa, 0xc1, 0x65, 0xae,
+	0x4a, 0xbb, 0xe5, 0x10, 0x64, 0x12, 0x1b, 0xb9, 0xa6, 0x4c, 0x7c, 0x53, 0x31, 0xb1, 0xcb, 0xaf,
+	0xba, 0xd2, 0xff, 0xed, 0xc0, 0xd7, 0x7a, 0xb9, 0x9f, 0xfa, 0x2e, 0x49, 0x6f, 0x63, 0xb1, 0xe2,
+	0xfa, 0xfb, 0xd8, 0xf4, 0x86, 0x98, 0xb9, 0xc6, 0x89, 0x14, 0xfb, 0x44, 0x76, 0x04, 0xa8, 0x31,
+	0xca, 0xe7, 0x2f, 0xfe, 0x0c, 0x00, 0x00, 0xff, 0xff, 0xa4, 0x61, 0xbd, 0x57, 0xba, 0x06, 0x00,
+	0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// EnvironmentsClient is the client API for Environments service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type EnvironmentsClient interface {
+	// Returns the list of all non-draft environments of the specified agent.
+	ListEnvironments(ctx context.Context, in *ListEnvironmentsRequest, opts ...grpc.CallOption) (*ListEnvironmentsResponse, error)
+}
+
+type environmentsClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewEnvironmentsClient(cc grpc.ClientConnInterface) EnvironmentsClient {
+	return &environmentsClient{cc}
+}
+
+func (c *environmentsClient) ListEnvironments(ctx context.Context, in *ListEnvironmentsRequest, opts ...grpc.CallOption) (*ListEnvironmentsResponse, error) {
+	out := new(ListEnvironmentsResponse)
+	err := c.cc.Invoke(ctx, "/google.cloud.dialogflow.v2beta1.Environments/ListEnvironments", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// EnvironmentsServer is the server API for Environments service.
+type EnvironmentsServer interface {
+	// Returns the list of all non-draft environments of the specified agent.
+	ListEnvironments(context.Context, *ListEnvironmentsRequest) (*ListEnvironmentsResponse, error)
+}
+
+// UnimplementedEnvironmentsServer can be embedded to have forward compatible implementations.
+type UnimplementedEnvironmentsServer struct {
+}
+
+func (*UnimplementedEnvironmentsServer) ListEnvironments(ctx context.Context, req *ListEnvironmentsRequest) (*ListEnvironmentsResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method ListEnvironments not implemented")
+}
+
+func RegisterEnvironmentsServer(s *grpc.Server, srv EnvironmentsServer) {
+	s.RegisterService(&_Environments_serviceDesc, srv)
+}
+
+func _Environments_ListEnvironments_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ListEnvironmentsRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(EnvironmentsServer).ListEnvironments(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/google.cloud.dialogflow.v2beta1.Environments/ListEnvironments",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(EnvironmentsServer).ListEnvironments(ctx, req.(*ListEnvironmentsRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Environments_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "google.cloud.dialogflow.v2beta1.Environments",
+	HandlerType: (*EnvironmentsServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "ListEnvironments",
+			Handler:    _Environments_ListEnvironments_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "google/cloud/dialogflow/v2beta1/environment.proto",
+}
diff --git a/googleapis/cloud/dialogflow/v2beta1/webhook.pb.go b/googleapis/cloud/dialogflow/v2beta1/webhook.pb.go
index dc528a6..c021cd2 100644
--- a/googleapis/cloud/dialogflow/v2beta1/webhook.pb.go
+++ b/googleapis/cloud/dialogflow/v2beta1/webhook.pb.go
@@ -122,18 +122,24 @@
 // [Protocol Buffers Language
 // Guide](https://developers.google.com/protocol-buffers/docs/proto3#json).
 type WebhookResponse struct {
-	// Optional. The text to be shown on the screen. This value is passed directly
-	// to `QueryResult.fulfillment_text`.
-	FulfillmentText string `protobuf:"bytes,1,opt,name=fulfillment_text,json=fulfillmentText,proto3" json:"fulfillment_text,omitempty"`
-	// Optional. The collection of rich messages to present to the user. This
-	// value is passed directly to `QueryResult.fulfillment_messages`.
-	FulfillmentMessages []*Intent_Message `protobuf:"bytes,2,rep,name=fulfillment_messages,json=fulfillmentMessages,proto3" json:"fulfillment_messages,omitempty"`
-	// Optional. This value is passed directly to `QueryResult.webhook_source`.
-	Source string `protobuf:"bytes,3,opt,name=source,proto3" json:"source,omitempty"`
-	// Optional. This field can be used to pass custom data from your webhook to the API
-	// caller. Arbitrary JSON objects are supported.
+	// Optional. The text response message intended for the end-user.
+	// It is recommended to use `fulfillment_messages.text.text[0]` instead.
 	// When provided, Dialogflow uses this field to populate
-	// `QueryResult.webhook_payload` sent to the API caller.
+	// [QueryResult.fulfillment_text][google.cloud.dialogflow.v2beta1.QueryResult.fulfillment_text] sent to the integration or API caller.
+	FulfillmentText string `protobuf:"bytes,1,opt,name=fulfillment_text,json=fulfillmentText,proto3" json:"fulfillment_text,omitempty"`
+	// Optional. The rich response messages intended for the end-user.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.fulfillment_messages][google.cloud.dialogflow.v2beta1.QueryResult.fulfillment_messages] sent to the integration or API caller.
+	FulfillmentMessages []*Intent_Message `protobuf:"bytes,2,rep,name=fulfillment_messages,json=fulfillmentMessages,proto3" json:"fulfillment_messages,omitempty"`
+	// Optional. A custom field used to identify the webhook source.
+	// Arbitrary strings are supported.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.webhook_source][google.cloud.dialogflow.v2beta1.QueryResult.webhook_source] sent to the integration or API caller.
+	Source string `protobuf:"bytes,3,opt,name=source,proto3" json:"source,omitempty"`
+	// Optional. This field can be used to pass custom data from your webhook to the
+	// integration or API caller. Arbitrary JSON objects are supported.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.webhook_payload][google.cloud.dialogflow.v2beta1.QueryResult.webhook_payload] sent to the integration or API caller.
 	// This field is also used by the
 	// [Google Assistant
 	// integration](https://cloud.google.com/dialogflow/docs/integrations/aog)
@@ -141,11 +147,12 @@
 	// See the format definition at [Google Assistant Dialogflow webhook
 	// format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
 	Payload *_struct.Struct `protobuf:"bytes,4,opt,name=payload,proto3" json:"payload,omitempty"`
-	// Optional. The collection of output contexts. This value is passed directly
-	// to `QueryResult.output_contexts`.
+	// Optional. The collection of output contexts that will overwrite currently
+	// active contexts for the session and reset their lifespans.
+	// When provided, Dialogflow uses this field to populate
+	// [QueryResult.output_contexts][google.cloud.dialogflow.v2beta1.QueryResult.output_contexts] sent to the integration or API caller.
 	OutputContexts []*Context `protobuf:"bytes,5,rep,name=output_contexts,json=outputContexts,proto3" json:"output_contexts,omitempty"`
-	// Optional. Makes the platform immediately invoke another `DetectIntent` call
-	// internally with the specified event as input.
+	// Optional. Invokes the supplied events.
 	// When this field is set, Dialogflow ignores the `fulfillment_text`,
 	// `fulfillment_messages`, and `payload` fields.
 	FollowupEventInput *EventInput `protobuf:"bytes,6,opt,name=followup_event_input,json=followupEventInput,proto3" json:"followup_event_input,omitempty"`
@@ -155,9 +162,9 @@
 	EndInteraction bool `protobuf:"varint,8,opt,name=end_interaction,json=endInteraction,proto3" json:"end_interaction,omitempty"`
 	// Optional. Additional session entity types to replace or extend developer
 	// entity types with. The entity synonyms apply to all languages and persist
-	// for the session of this query. Setting the session entity types inside
-	// webhook overwrites the session entity types that have been set through
-	// `DetectIntentRequest.query_params.session_entity_types`.
+	// for the session. Setting this data from a webhook overwrites
+	// the session entity types that have been set using `detectIntent`,
+	// `streamingDetectIntent` or [SessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityType] management methods.
 	SessionEntityTypes   []*SessionEntityType `protobuf:"bytes,10,rep,name=session_entity_types,json=sessionEntityTypes,proto3" json:"session_entity_types,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}             `json:"-"`
 	XXX_unrecognized     []byte               `json:"-"`