question: public boolean isExpanded ( int row ) { TreeUI tree = getUI ( ) ; if ( tree != null ) { TreePath path = tree . getPathForRow ( this , row ) ; if ( path != null ) { Boolean value = expandedState . get ( path ) ; return ( value != null && value . booleanValue ( ) ) ; } } return false ; }
target:  Returns true if the node at the specified display row is currently expanded.