public Builder setScenarioExecutionStartingRequest(
          main.Messages.ScenarioExecutionStartingRequest.Builder builderForValue) {
        if (scenarioExecutionStartingRequestBuilder_ == null) {
          scenarioExecutionStartingRequest_ = builderForValue.build();
          onChanged();
        } else {
          scenarioExecutionStartingRequestBuilder_.setMessage(builderForValue.build());
        }
        bitField0_ |= 0x00000020;
        return this;
      }