public Builder mergeRallyUnit(org.bwapi.proxy.messages.GameMessages.UnitId value) {
        if (rallyUnitBuilder_ == null) {
          if (((bitField1_ & 0x00100000) == 0x00100000) &&
              rallyUnit_ != org.bwapi.proxy.messages.GameMessages.UnitId.getDefaultInstance()) {
            rallyUnit_ =
              org.bwapi.proxy.messages.GameMessages.UnitId.newBuilder(rallyUnit_).mergeFrom(value).buildPartial();
          } else {
            rallyUnit_ = value;
          }
          onChanged();
        } else {
          rallyUnitBuilder_.mergeFrom(value);
        }
        bitField1_ |= 0x00100000;
        return this;
      }