public Builder setStepValidateResponse(main.Messages.StepValidateResponse value) {
        if (stepValidateResponseBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          stepValidateResponse_ = value;
          onChanged();
        } else {
          stepValidateResponseBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000800;
        return this;
      }