public Builder mergeNydusExit(org.bwapi.proxy.messages.GameMessages.UnitId value) {
        if (nydusExitBuilder_ == null) {
          if (((bitField1_ & 0x01000000) == 0x01000000) &&
              nydusExit_ != org.bwapi.proxy.messages.GameMessages.UnitId.getDefaultInstance()) {
            nydusExit_ =
              org.bwapi.proxy.messages.GameMessages.UnitId.newBuilder(nydusExit_).mergeFrom(value).buildPartial();
          } else {
            nydusExit_ = value;
          }
          onChanged();
        } else {
          nydusExitBuilder_.mergeFrom(value);
        }
        bitField1_ |= 0x01000000;
        return this;
      }