Synchronize new proto changes.
diff --git a/google/bigtable/v2/bigtable_gapic.yaml b/google/bigtable/v2/bigtable_gapic.yaml
index 9f32636..fb1ac38 100644
--- a/google/bigtable/v2/bigtable_gapic.yaml
+++ b/google/bigtable/v2/bigtable_gapic.yaml
@@ -108,6 +108,7 @@
       - parameters:
           - table_name
           - row_key
+          - predicate_filter
           - true_mutations
           - false_mutations
     # Note that one of {true_mutations,false_mutations} must be specified, but