if (mySelectedObject == null) { mySelectedObject = selectedObject; } else if (mySelectedObject == selectedObject) { doubleClickedObjectInOutline(selectedObject); mySelectedObject = null; } else { mySelectedObject = selectedObject; }
    public void selectionChanged(SelectionChangedEvent _event) {      IStructuredSelection selection = (IStructuredSelection) _event.getSelection();      setSelection(selection, false);    }