setTitleDisplayName( handle );
	public void handleSelectionChanged( ISelection selection )	{		if ( this.selection != null &&  this.selection.equals( selection )  )			return;		this.selection = selection;		deRegisterListeners( );		list = getModelList( selection );		GroupElementHandle handle = DEUtil.getMultiSelectionHandle( list );		if ( handle != null && !handle.isSameType( ) )		{			viewer.setInput( null );			return;		}		viewer.setInput( handle );		registerListeners( );		expandToDefaultLevel( );	}