private com.google.protobuf.SingleFieldBuilder<
          main.Messages.ExecutionEndingRequest, main.Messages.ExecutionEndingRequest.Builder, main.Messages.ExecutionEndingRequestOrBuilder> 
          getExecutionEndingRequestFieldBuilder() {
        if (executionEndingRequestBuilder_ == null) {
          executionEndingRequestBuilder_ = new com.google.protobuf.SingleFieldBuilder<
              main.Messages.ExecutionEndingRequest, main.Messages.ExecutionEndingRequest.Builder, main.Messages.ExecutionEndingRequestOrBuilder>(
                  executionEndingRequest_,
                  getParentForChildren(),
                  isClean());
          executionEndingRequest_ = null;
        }
        return executionEndingRequestBuilder_;
      }