public Builder mergeFrom(com.google.cloud.tpu.v2.ListRuntimeVersionsResponse other) {
      if (other == com.google.cloud.tpu.v2.ListRuntimeVersionsResponse.getDefaultInstance())
        return this;
      if (runtimeVersionsBuilder_ == null) {
        if (!other.runtimeVersions_.isEmpty()) {
          if (runtimeVersions_.isEmpty()) {
            runtimeVersions_ = other.runtimeVersions_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureRuntimeVersionsIsMutable();
            runtimeVersions_.addAll(other.runtimeVersions_);
          }
          onChanged();
        }
      } else {
        if (!other.runtimeVersions_.isEmpty()) {
          if (runtimeVersionsBuilder_.isEmpty()) {
            runtimeVersionsBuilder_.dispose();
            runtimeVersionsBuilder_ = null;
            runtimeVersions_ = other.runtimeVersions_;
            bitField0_ = (bitField0_ & ~0x00000001);
            runtimeVersionsBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getRuntimeVersionsFieldBuilder()
                    : null;
          } else {
            runtimeVersionsBuilder_.addAllMessages(other.runtimeVersions_);
          }
        }
      }
      if (!other.getNextPageToken().isEmpty()) {
        nextPageToken_ = other.nextPageToken_;
        bitField0_ |= 0x00000002;
        onChanged();
      }
      if (!other.unreachable_.isEmpty()) {
        if (unreachable_.isEmpty()) {
          unreachable_ = other.unreachable_;
          bitField0_ |= 0x00000004;
        } else {
          ensureUnreachableIsMutable();
          unreachable_.addAll(other.unreachable_);
        }
        onChanged();
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
Response for
[ListRuntimeVersions][google.cloud.tpu.v2.Tpu.ListRuntimeVersions].
</pre>

Protobuf type {@code google.cloud.tpu.v2.ListRuntimeVersionsResponse}
java-tpu/proto-google-cloud-tpu-v2/src/main/java/com/google/cloud/tpu/v2/ListRuntimeVersionsResponse.java