Bug 301131 CreateGroupOperation, GroupDescription should be renamed or merged into existing classes
There are some remaining issues related to renamin Groups into Virtual Folders. org.eclipse.ui.internal.ide.undo.GroupDescription IMO should be merged with FolderDescription org.eclipse.ui.ide.undo.CreateGroupOperation should be merged with CreateFolderOperation IDEResourceInfoUtils#GROUP_TEXT org.eclipse.ui.wizards.datatransfer#ImportOperation#setCreateGroups Remy, if you see other related issues, please add a comment to the bug.
bundles/org.eclipse.ui.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java
*/
	private IResource[] getSelectedResources() {
		ISelection selection = LocalSelectionTransfer.getTransfer()
				.getSelection();
		if (selection instanceof IStructuredSelection) {
			return getSelectedResources((IStructuredSelection)selection);
		} 
		return NO_RESOURCES;
	}
	/**
	 * Returns the resource selection from the LocalSelectionTransfer.
	 * 
	 * @return the resource selection from the LocalSelectionTransfer
	 */
	private IResource[] getSelectedResources(IStructuredSelection selection) {
		ArrayList selectedResources = new ArrayList();
		for (Iterator i = selection.iterator(); i.hasNext();) {
			Object o = i.next();
			if (o instanceof IResource) {
				selectedResources.add(o);
			} else if (o instanceof IAdaptable) {
				IAdaptable a = (IAdaptable) o;
				IResource r = (IResource) a.getAdapter(IResource.class);
				if (r != null) {
					selectedResources.add(r);
				}
			}
		}
		return (IResource[]) selectedResources
				.toArray(new IResource[selectedResources.size()]);