@Override protected Object[] availableIDsArray(){
  LinkedList retVal=new LinkedList();
  retVal.addAll(this.durableIDsList);
  retVal.addAll(idsAvailable);
  return retVal.toArray();
}

@ Override protected Object [ ] availableIDsArray ( ) { LinkedList retVal = new LinkedList ( ) ; retVal . addAll ( this . durableIDsList ) ; retVal . addAll ( idsAvailable ) ; return retVal . toArray ( ) ; }
caller must hold rwlock
