private void ensureKilledUnitCountIsMutable() {
        if (!((bitField0_ & 0x00040000) == 0x00040000)) {
          killedUnitCount_ = new java.util.ArrayList<org.bwapi.proxy.messages.GameMessages.UnitTypeIntPair>(killedUnitCount_);
          bitField0_ |= 0x00040000;
         }
      }