private com.google.protobuf.SingleFieldBuilder<
          main.Messages.ScenarioExecutionEndingRequest, main.Messages.ScenarioExecutionEndingRequest.Builder, main.Messages.ScenarioExecutionEndingRequestOrBuilder> 
          getScenarioExecutionEndingRequestFieldBuilder() {
        if (scenarioExecutionEndingRequestBuilder_ == null) {
          scenarioExecutionEndingRequestBuilder_ = new com.google.protobuf.SingleFieldBuilder<
              main.Messages.ScenarioExecutionEndingRequest, main.Messages.ScenarioExecutionEndingRequest.Builder, main.Messages.ScenarioExecutionEndingRequestOrBuilder>(
                  scenarioExecutionEndingRequest_,
                  getParentForChildren(),
                  isClean());
          scenarioExecutionEndingRequest_ = null;
        }
        return scenarioExecutionEndingRequestBuilder_;
      }