addSelectionListener(dndListener, filter);
int operations = DND.DROP_COPY | DND.DROP_MOVE;
treeViewer.addDragSupport(operations, transfer,
new LayoutDragSourceListener(transfer[0], actionDetails));
treeViewer.addDropSupport(operations, transfer,
new LayoutDropTargetListener(actionDetails,
odomEditorContext.getODOMSelectionManager(),
odomEditorContext.getLayoutEditorContext()));
}