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
*            destination to which files will be copied
	 * @param monitor
	 *            the monitor that information will be sent to.
	 * @see WorkspaceModifyOperation
	 * @see WorkspaceJob
	 * @since 3.2
	 */
	public void copyFilesInCurrentThread(final String[] fileNames,
			IContainer destination, IProgressMonitor monitor) {
		IFileStore[] stores = buildFileStores(fileNames);
		if (stores == null) {
			return;
		}
		copyFileStores(destination, stores, false, monitor);
	}
	/**
	 * Build the collection of fileStores that map to fileNames. If any of them
	 * cannot be found then match then return null.
	 * 
	 * @param fileNames
	 * @return IFileStore[]
	 */
	private IFileStore[] buildFileStores(final String[] fileNames) {
		IFileStore[] stores = new IFileStore[fileNames.length];
		for (int i = 0; i < fileNames.length; i++) {
			IFileStore store = IDEResourceInfoUtils.getFileStore(fileNames[i]);
			if (store == null) {
				reportFileInfoNotFound(fileNames[i]);
				return null;
			}