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
* Copies the given files and folders to the destination. The current Thread
	 * is halted while the resources are copied using a
	 * WorkspaceModifyOperation. This method should be called from the UI
	 * Thread.
	 * 
	 * @param fileNames
	 *            names of the files to copy
	 * @param destination
	 *            destination to which files will be copied
	 * @see WorkspaceModifyOperation
	 * @see Display#getThread()
	 * @see Thread#currentThread()
	 * @since 3.2
	 */
	public void copyFiles(final String[] fileNames, IContainer destination) {
		IFileStore[] stores = buildFileStores(fileNames);
		if (stores == null) {
			return;
		}
		copyFileStores(destination, stores, true, null);
	}
	/**
	 * Copies the given files and folders to the destination without forking a
	 * new Thread or blocking using a WorkspaceModifyOperation. It is
	 * recommended that this method only be called from a {@link WorkspaceJob}
	 * to avoid possible deadlock.
	 * 
	 * @param fileNames
	 *            names of the files to copy
	 * @param destination