public Builder setExecutionStartingRequest(
          main.Messages.ExecutionStartingRequest.Builder builderForValue) {
        if (executionStartingRequestBuilder_ == null) {
          executionStartingRequest_ = builderForValue.build();
          onChanged();
        } else {
          executionStartingRequestBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000004;
        return this;
      }