TreeItem[] selection = AvailableDbObjects.getSelection( );
TreeItem[] selection = availableDbObjectsTree.getSelection( );
			public void dragStart( DragSourceEvent event )			{				TreeItem[] selection = AvailableDbObjects.getSelection( );				if ( selection.length <= 0						|| selection[0].getData( ) == null )				{					event.doit = false;					return;				}			}