public void registerCritterRemoveListener(CritterRemoveListener removeListener){
  if (!lListeners.contains(removeListener)) {
    lListeners.add(removeListener);
  }
}

public void registerCritterRemoveListener ( CritterRemoveListener removeListener ) { if ( ! lListeners . contains ( removeListener ) ) { lListeners . add ( removeListener ) ; } }
listens for removal callbacks
