private void ensureDestroyedUnitsIsMutable() {
        if (!((bitField0_ & 0x00000200) == 0x00000200)) {
          destroyedUnits_ = new java.util.ArrayList<org.bwapi.proxy.messages.GameMessages.UnitId>(destroyedUnits_);
          bitField0_ |= 0x00000200;
         }
      }