diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenRequest.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenRequest.java
index 78035a93ecc5..94e547c50482 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenRequest.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenRequest.java
@@ -54,7 +54,7 @@ private GenerateAccessTokenRequest(
           case 18:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
                 delegates_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000002;
               }
@@ -64,7 +64,7 @@ private GenerateAccessTokenRequest(
           case 34:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000004) == 0x00000004)) {
+              if (!((mutable_bitField0_ & 0x00000004) != 0)) {
                 scope_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000004;
               }
@@ -88,7 +88,7 @@ private GenerateAccessTokenRequest(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -100,10 +100,10 @@ private GenerateAccessTokenRequest(
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
-      if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
       }
-      if (((mutable_bitField0_ & 0x00000004) == 0x00000004)) {
+      if (((mutable_bitField0_ & 0x00000004) != 0)) {
         scope_ = scope_.getUnmodifiableView();
       }
       this.unknownFields = unknownFields.build();
@@ -437,16 +437,15 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateAccessTokenRequest other =
         (com.google.cloud.iam.credentials.v1.GenerateAccessTokenRequest) obj;
 
-    boolean result = true;
-    result = result && getName().equals(other.getName());
-    result = result && getDelegatesList().equals(other.getDelegatesList());
-    result = result && getScopeList().equals(other.getScopeList());
-    result = result && (hasLifetime() == other.hasLifetime());
+    if (!getName().equals(other.getName())) return false;
+    if (!getDelegatesList().equals(other.getDelegatesList())) return false;
+    if (!getScopeList().equals(other.getScopeList())) return false;
+    if (hasLifetime() != other.hasLifetime()) return false;
     if (hasLifetime()) {
-      result = result && getLifetime().equals(other.getLifetime());
+      if (!getLifetime().equals(other.getLifetime())) return false;
     }
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -651,12 +650,12 @@ public com.google.cloud.iam.credentials.v1.GenerateAccessTokenRequest buildParti
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
       result.name_ = name_;
-      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000002);
       }
       result.delegates_ = delegates_;
-      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+      if (((bitField0_ & 0x00000004) != 0)) {
         scope_ = scope_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000004);
       }
@@ -673,35 +672,35 @@ public com.google.cloud.iam.credentials.v1.GenerateAccessTokenRequest buildParti
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -886,7 +885,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureDelegatesIsMutable() {
-      if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (!((bitField0_ & 0x00000002) != 0)) {
         delegates_ = new com.google.protobuf.LazyStringArrayList(delegates_);
         bitField0_ |= 0x00000002;
       }
@@ -1092,7 +1091,7 @@ public Builder addDelegatesBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureScopeIsMutable() {
-      if (!((bitField0_ & 0x00000004) == 0x00000004)) {
+      if (!((bitField0_ & 0x00000004) != 0)) {
         scope_ = new com.google.protobuf.LazyStringArrayList(scope_);
         bitField0_ |= 0x00000004;
       }
@@ -1258,7 +1257,7 @@ public Builder addScopeBytes(com.google.protobuf.ByteString value) {
       return this;
     }
 
-    private com.google.protobuf.Duration lifetime_ = null;
+    private com.google.protobuf.Duration lifetime_;
     private com.google.protobuf.SingleFieldBuilderV3<
             com.google.protobuf.Duration,
             com.google.protobuf.Duration.Builder,
@@ -1462,7 +1461,7 @@ public com.google.protobuf.DurationOrBuilder getLifetimeOrBuilder() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenResponse.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenResponse.java
index d8eab2301d25..7744744b4baf 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenResponse.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateAccessTokenResponse.java
@@ -66,7 +66,7 @@ private GenerateAccessTokenResponse(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -234,14 +234,13 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateAccessTokenResponse other =
         (com.google.cloud.iam.credentials.v1.GenerateAccessTokenResponse) obj;
 
-    boolean result = true;
-    result = result && getAccessToken().equals(other.getAccessToken());
-    result = result && (hasExpireTime() == other.hasExpireTime());
+    if (!getAccessToken().equals(other.getAccessToken())) return false;
+    if (hasExpireTime() != other.hasExpireTime()) return false;
     if (hasExpireTime()) {
-      result = result && getExpireTime().equals(other.getExpireTime());
+      if (!getExpireTime().equals(other.getExpireTime())) return false;
     }
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -443,35 +442,35 @@ public com.google.cloud.iam.credentials.v1.GenerateAccessTokenResponse buildPart
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -621,7 +620,7 @@ public Builder setAccessTokenBytes(com.google.protobuf.ByteString value) {
       return this;
     }
 
-    private com.google.protobuf.Timestamp expireTime_ = null;
+    private com.google.protobuf.Timestamp expireTime_;
     private com.google.protobuf.SingleFieldBuilderV3<
             com.google.protobuf.Timestamp,
             com.google.protobuf.Timestamp.Builder,
@@ -811,7 +810,7 @@ public com.google.protobuf.TimestampOrBuilder getExpireTimeOrBuilder() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenRequest.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenRequest.java
index 81ac3a6e9ccf..bf8b62cc82f5 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenRequest.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenRequest.java
@@ -18,7 +18,6 @@ private GenerateIdTokenRequest() {
     name_ = "";
     delegates_ = com.google.protobuf.LazyStringArrayList.EMPTY;
     audience_ = "";
-    includeEmail_ = false;
   }
 
   @java.lang.Override
@@ -55,7 +54,7 @@ private GenerateIdTokenRequest(
           case 18:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
                 delegates_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000002;
               }
@@ -76,7 +75,7 @@ private GenerateIdTokenRequest(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -88,7 +87,7 @@ private GenerateIdTokenRequest(
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
-      if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
       }
       this.unknownFields = unknownFields.build();
@@ -367,13 +366,12 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateIdTokenRequest other =
         (com.google.cloud.iam.credentials.v1.GenerateIdTokenRequest) obj;
 
-    boolean result = true;
-    result = result && getName().equals(other.getName());
-    result = result && getDelegatesList().equals(other.getDelegatesList());
-    result = result && getAudience().equals(other.getAudience());
-    result = result && (getIncludeEmail() == other.getIncludeEmail());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getName().equals(other.getName())) return false;
+    if (!getDelegatesList().equals(other.getDelegatesList())) return false;
+    if (!getAudience().equals(other.getAudience())) return false;
+    if (getIncludeEmail() != other.getIncludeEmail()) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -569,7 +567,7 @@ public com.google.cloud.iam.credentials.v1.GenerateIdTokenRequest buildPartial()
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
       result.name_ = name_;
-      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000002);
       }
@@ -583,35 +581,35 @@ public com.google.cloud.iam.credentials.v1.GenerateIdTokenRequest buildPartial()
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -788,7 +786,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureDelegatesIsMutable() {
-      if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (!((bitField0_ & 0x00000002) != 0)) {
         delegates_ = new com.google.protobuf.LazyStringArrayList(delegates_);
         bitField0_ |= 0x00000002;
       }
@@ -1138,7 +1136,7 @@ public Builder clearIncludeEmail() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenResponse.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenResponse.java
index bd1eea3ff1cf..217f12c50458 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenResponse.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdTokenResponse.java
@@ -51,7 +51,7 @@ private GenerateIdTokenResponse(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -171,10 +171,9 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateIdTokenResponse other =
         (com.google.cloud.iam.credentials.v1.GenerateIdTokenResponse) obj;
 
-    boolean result = true;
-    result = result && getToken().equals(other.getToken());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getToken().equals(other.getToken())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -360,35 +359,35 @@ public com.google.cloud.iam.credentials.v1.GenerateIdTokenResponse buildPartial(
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -534,7 +533,7 @@ public Builder setTokenBytes(com.google.protobuf.ByteString value) {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenRequest.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenRequest.java
index 9886d1c699fd..46311ac7fcc9 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenRequest.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenRequest.java
@@ -56,7 +56,7 @@ private GenerateIdentityBindingAccessTokenRequest(
           case 18:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
                 scope_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000002;
               }
@@ -72,7 +72,7 @@ private GenerateIdentityBindingAccessTokenRequest(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -84,7 +84,7 @@ private GenerateIdentityBindingAccessTokenRequest(
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
-      if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
         scope_ = scope_.getUnmodifiableView();
       }
       this.unknownFields = unknownFields.build();
@@ -409,12 +409,11 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenRequest other =
         (com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenRequest) obj;
 
-    boolean result = true;
-    result = result && getName().equals(other.getName());
-    result = result && getScopeList().equals(other.getScopeList());
-    result = result && getJwt().equals(other.getJwt());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getName().equals(other.getName())) return false;
+    if (!getScopeList().equals(other.getScopeList())) return false;
+    if (!getJwt().equals(other.getJwt())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -618,7 +617,7 @@ public com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenReq
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
       result.name_ = name_;
-      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((bitField0_ & 0x00000002) != 0)) {
         scope_ = scope_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000002);
       }
@@ -631,35 +630,35 @@ public com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenReq
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -840,7 +839,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureScopeIsMutable() {
-      if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (!((bitField0_ & 0x00000002) != 0)) {
         scope_ = new com.google.protobuf.LazyStringArrayList(scope_);
         bitField0_ |= 0x00000002;
       }
@@ -1312,7 +1311,7 @@ public Builder setJwtBytes(com.google.protobuf.ByteString value) {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenResponse.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenResponse.java
index bad691fb19aa..ef5fc450f390 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenResponse.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/GenerateIdentityBindingAccessTokenResponse.java
@@ -68,7 +68,7 @@ private GenerateIdentityBindingAccessTokenResponse(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -239,14 +239,13 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenResponse other =
         (com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenResponse) obj;
 
-    boolean result = true;
-    result = result && getAccessToken().equals(other.getAccessToken());
-    result = result && (hasExpireTime() == other.hasExpireTime());
+    if (!getAccessToken().equals(other.getAccessToken())) return false;
+    if (hasExpireTime() != other.hasExpireTime()) return false;
     if (hasExpireTime()) {
-      result = result && getExpireTime().equals(other.getExpireTime());
+      if (!getExpireTime().equals(other.getExpireTime())) return false;
     }
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -459,35 +458,35 @@ public com.google.cloud.iam.credentials.v1.GenerateIdentityBindingAccessTokenRes
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -641,7 +640,7 @@ public Builder setAccessTokenBytes(com.google.protobuf.ByteString value) {
       return this;
     }
 
-    private com.google.protobuf.Timestamp expireTime_ = null;
+    private com.google.protobuf.Timestamp expireTime_;
     private com.google.protobuf.SingleFieldBuilderV3<
             com.google.protobuf.Timestamp,
             com.google.protobuf.Timestamp.Builder,
@@ -831,7 +830,7 @@ public com.google.protobuf.TimestampOrBuilder getExpireTimeOrBuilder() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobRequest.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobRequest.java
index 990a45ee8d27..ccde34c06a0c 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobRequest.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobRequest.java
@@ -54,7 +54,7 @@ private SignBlobRequest(
           case 26:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
                 delegates_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000002;
               }
@@ -68,7 +68,7 @@ private SignBlobRequest(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -80,7 +80,7 @@ private SignBlobRequest(
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
-      if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
       }
       this.unknownFields = unknownFields.build();
@@ -307,12 +307,11 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.SignBlobRequest other =
         (com.google.cloud.iam.credentials.v1.SignBlobRequest) obj;
 
-    boolean result = true;
-    result = result && getName().equals(other.getName());
-    result = result && getDelegatesList().equals(other.getDelegatesList());
-    result = result && getPayload().equals(other.getPayload());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getName().equals(other.getName())) return false;
+    if (!getDelegatesList().equals(other.getDelegatesList())) return false;
+    if (!getPayload().equals(other.getPayload())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -503,7 +502,7 @@ public com.google.cloud.iam.credentials.v1.SignBlobRequest buildPartial() {
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
       result.name_ = name_;
-      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000002);
       }
@@ -516,35 +515,35 @@ public com.google.cloud.iam.credentials.v1.SignBlobRequest buildPartial() {
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -717,7 +716,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureDelegatesIsMutable() {
-      if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (!((bitField0_ & 0x00000002) != 0)) {
         delegates_ = new com.google.protobuf.LazyStringArrayList(delegates_);
         bitField0_ |= 0x00000002;
       }
@@ -968,7 +967,7 @@ public Builder clearPayload() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobResponse.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobResponse.java
index 2ff537ecab37..1eb856ffba0b 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobResponse.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignBlobResponse.java
@@ -57,7 +57,7 @@ private SignBlobResponse(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -198,11 +198,10 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.SignBlobResponse other =
         (com.google.cloud.iam.credentials.v1.SignBlobResponse) obj;
 
-    boolean result = true;
-    result = result && getKeyId().equals(other.getKeyId());
-    result = result && getSignedBlob().equals(other.getSignedBlob());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getKeyId().equals(other.getKeyId())) return false;
+    if (!getSignedBlob().equals(other.getSignedBlob())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -392,35 +391,35 @@ public com.google.cloud.iam.credentials.v1.SignBlobResponse buildPartial() {
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -616,7 +615,7 @@ public Builder clearSignedBlob() {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtRequest.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtRequest.java
index da331a6e73d8..e9bc053dd8d0 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtRequest.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtRequest.java
@@ -54,7 +54,7 @@ private SignJwtRequest(
           case 26:
             {
               java.lang.String s = input.readStringRequireUtf8();
-              if (!((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+              if (!((mutable_bitField0_ & 0x00000002) != 0)) {
                 delegates_ = new com.google.protobuf.LazyStringArrayList();
                 mutable_bitField0_ |= 0x00000002;
               }
@@ -70,7 +70,7 @@ private SignJwtRequest(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -82,7 +82,7 @@ private SignJwtRequest(
     } catch (java.io.IOException e) {
       throw new com.google.protobuf.InvalidProtocolBufferException(e).setUnfinishedMessage(this);
     } finally {
-      if (((mutable_bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((mutable_bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
       }
       this.unknownFields = unknownFields.build();
@@ -337,12 +337,11 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.SignJwtRequest other =
         (com.google.cloud.iam.credentials.v1.SignJwtRequest) obj;
 
-    boolean result = true;
-    result = result && getName().equals(other.getName());
-    result = result && getDelegatesList().equals(other.getDelegatesList());
-    result = result && getPayload().equals(other.getPayload());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getName().equals(other.getName())) return false;
+    if (!getDelegatesList().equals(other.getDelegatesList())) return false;
+    if (!getPayload().equals(other.getPayload())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -533,7 +532,7 @@ public com.google.cloud.iam.credentials.v1.SignJwtRequest buildPartial() {
       int from_bitField0_ = bitField0_;
       int to_bitField0_ = 0;
       result.name_ = name_;
-      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (((bitField0_ & 0x00000002) != 0)) {
         delegates_ = delegates_.getUnmodifiableView();
         bitField0_ = (bitField0_ & ~0x00000002);
       }
@@ -546,35 +545,35 @@ public com.google.cloud.iam.credentials.v1.SignJwtRequest buildPartial() {
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -748,7 +747,7 @@ public Builder setNameBytes(com.google.protobuf.ByteString value) {
         com.google.protobuf.LazyStringArrayList.EMPTY;
 
     private void ensureDelegatesIsMutable() {
-      if (!((bitField0_ & 0x00000002) == 0x00000002)) {
+      if (!((bitField0_ & 0x00000002) != 0)) {
         delegates_ = new com.google.protobuf.LazyStringArrayList(delegates_);
         bitField0_ |= 0x00000002;
       }
@@ -1046,7 +1045,7 @@ public Builder setPayloadBytes(com.google.protobuf.ByteString value) {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtResponse.java b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtResponse.java
index d718f98ec54c..1fb59b7bd5d4 100644
--- a/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtResponse.java
+++ b/google-api-grpc/proto-google-cloud-iamcredentials-v1/src/main/java/com/google/cloud/iam/credentials/v1/SignJwtResponse.java
@@ -59,7 +59,7 @@ private SignJwtResponse(
             }
           default:
             {
-              if (!parseUnknownFieldProto3(input, unknownFields, extensionRegistry, tag)) {
+              if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
                 done = true;
               }
               break;
@@ -228,11 +228,10 @@ public boolean equals(final java.lang.Object obj) {
     com.google.cloud.iam.credentials.v1.SignJwtResponse other =
         (com.google.cloud.iam.credentials.v1.SignJwtResponse) obj;
 
-    boolean result = true;
-    result = result && getKeyId().equals(other.getKeyId());
-    result = result && getSignedJwt().equals(other.getSignedJwt());
-    result = result && unknownFields.equals(other.unknownFields);
-    return result;
+    if (!getKeyId().equals(other.getKeyId())) return false;
+    if (!getSignedJwt().equals(other.getSignedJwt())) return false;
+    if (!unknownFields.equals(other.unknownFields)) return false;
+    return true;
   }
 
   @java.lang.Override
@@ -422,35 +421,35 @@ public com.google.cloud.iam.credentials.v1.SignJwtResponse buildPartial() {
 
     @java.lang.Override
     public Builder clone() {
-      return (Builder) super.clone();
+      return super.clone();
     }
 
     @java.lang.Override
     public Builder setField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.setField(field, value);
+      return super.setField(field, value);
     }
 
     @java.lang.Override
     public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
-      return (Builder) super.clearField(field);
+      return super.clearField(field);
     }
 
     @java.lang.Override
     public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
-      return (Builder) super.clearOneof(oneof);
+      return super.clearOneof(oneof);
     }
 
     @java.lang.Override
     public Builder setRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
-      return (Builder) super.setRepeatedField(field, index, value);
+      return super.setRepeatedField(field, index, value);
     }
 
     @java.lang.Override
     public Builder addRepeatedField(
         com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
-      return (Builder) super.addRepeatedField(field, value);
+      return super.addRepeatedField(field, value);
     }
 
     @java.lang.Override
@@ -694,7 +693,7 @@ public Builder setSignedJwtBytes(com.google.protobuf.ByteString value) {
 
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
-      return super.setUnknownFieldsProto3(unknownFields);
+      return super.setUnknownFields(unknownFields);
     }
 
     @java.lang.Override
diff --git a/google-cloud-clients/google-cloud-iamcredentials/synth.metadata b/google-cloud-clients/google-cloud-iamcredentials/synth.metadata
index c3dc172297ce..cae9e23413f0 100644
--- a/google-cloud-clients/google-cloud-iamcredentials/synth.metadata
+++ b/google-cloud-clients/google-cloud-iamcredentials/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-03-28T07:46:30.745415Z",
+  "updateTime": "2019-03-29T07:46:48.918715Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.20",
-        "dockerImage": "googleapis/artman@sha256:e3c054a2fb85a12481c722af616c7fb6f1d02d862248385eecbec3e4240ebd1e"
+        "version": "0.16.21",
+        "dockerImage": "googleapis/artman@sha256:854131ec1af7b3a313253474c24748dc0acd217a58a0b74dbfb559f340a15d78"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "6a84b3267b0a95e922608b9891219075047eee29",
-        "internalRef": "240640999"
+        "sha": "37386f1ebcaed51bcb7d15d00124d22c38606e45",
+        "internalRef": "240841842"
       }
     }
   ],