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.ide/extensions/org/eclipse/ui/actions/CopyFilesAndFoldersOperation.java
* Records the core exception to be displayed to the user once the action is
	 * finished.
	 * 
	 * @param error
	 *            a <code>CoreException</code>
	 */
	private void recordError(CoreException error) {
		if (errorStatus == null) {
			errorStatus = new MultiStatus(PlatformUI.PLUGIN_ID, IStatus.ERROR,
					getProblemsMessage(), error);
		}
		errorStatus.merge(error.getStatus());
	}
	/**
	 * Checks whether the destination is valid for copying the source resources.
	 * <p>
	 * Note this method is for internal use only. It is not API.
	 * </p>
	 * 
	 * @param destination
	 *            the destination container
	 * @param sourceResources
	 *            the source resources
	 * @return an error message, or <code>null</code> if the path is valid
	 */
	public String validateDestination(IContainer destination,
			IResource[] sourceResources) {
		if (!isAccessible(destination)) {
			return IDEWorkbenchMessages.CopyFilesAndFoldersOperation_destinationAccessError;
		}