public Builder setScreenPosition(org.bwapi.proxy.messages.BasicTypes.Position value) {
        if (screenPositionBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          screenPosition_ = value;
          onChanged();
        } else {
          screenPositionBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000040;
        return this;
      }