code: public LockEntry getWriter(Object obj)
  	{
  		PersistenceBroker broker = getBroker();
  		Identity oid = new Identity(obj, broker);
  		
          LockEntry result = null;
          try
          {
          	result = getWriterRemote(oid);
          }
          catch (Throwable e)
          {
          	log.error(e);
          }
  		return result;
  	}
docs: returns the LockEntry for the Writer of object obj.
  If now writer exists, null is returned.