public Builder mergeExecutionStatus(main.Messages.ExecutionStatus value) {
        if (executionStatusBuilder_ == null) {
          if (((bitField0_ & 0x00000001) == 0x00000001) &&
              executionStatus_ != main.Messages.ExecutionStatus.getDefaultInstance()) {
            executionStatus_ =
              main.Messages.ExecutionStatus.newBuilder(executionStatus_).mergeFrom(value).buildPartial();
          } else {
            executionStatus_ = value;
          }
          onChanged();
        } else {
          executionStatusBuilder_.mergeFrom(value);
        }
        bitField0_ |= 0x00000001;
        return this;
      }