public Builder setService(
          int index, com.google.protobuf.DescriptorProtos.ServiceDescriptorProto.Builder builderForValue) {
        if (serviceBuilder_ == null) {
          ensureServiceIsMutable();
          service_.set(index, builderForValue.build());
          onChanged();
        } else {
          serviceBuilder_.setMessage(index, builderForValue.build());
        }
        return this;
      }