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