columnList = DEUtil.getBingdingColumnList( inputGroup );
keyChooser.removeAll( ); columnList = DEUtil.getVisiableColumnBindingsList( inputGroup );
	private void refreshColumnList( )	{		columnList = DEUtil.getBingdingColumnList( inputGroup );		Iterator itor = columnList.iterator( );		while ( itor.hasNext( ) )		{			keyChooser.add( ( (ComputedColumnHandle) itor.next( ) ).getName( ) );		}	}