private void basicInvalidate(final EntryEventImpl event,boolean invokeCallbacks) throws EntryNotFoundException {
  basicInvalidate(event,invokeCallbacks,false);
}

private void basicInvalidate ( final EntryEventImpl event , boolean invokeCallbacks ) throws EntryNotFoundException { basicInvalidate ( event , invokeCallbacks , false ) ; }
return true if invalidation occurred ; false if it did not , for example if it was already invalidated
