public void invalidate(String group){
  Iterator items=items(group,ValidatedPredicate.TRUE);
  while (items.hasNext()) {
    VisualItem item=(VisualItem)items.next();
    item.setValidated(false);
  }
}

public void invalidate ( String group ) { Iterator items = items ( group , ValidatedPredicate . TRUE ) ; while ( items . hasNext ( ) ) { VisualItem item = ( VisualItem ) items . next ( ) ; item . setValidated ( false ) ; } }
invalidate the bounds of all visualitems in the given group . this will cause the bounds to be recomputed for all items upon the next redraw .
