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