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
*            source resource
	 * @param destination
	 *            destination resource
	 * @return boolean <code>true</code> if both resources are either linked
	 *         or unlinked. <code>false</code> otherwise.
	 */
	protected boolean homogenousResources(IResource source,
			IResource destination) {
		boolean isSourceLinked = source.isLinked();
		boolean isDestinationLinked = destination.isLinked();
		return (isSourceLinked && isDestinationLinked || isSourceLinked == false
				&& isDestinationLinked == false);
	}
	/**
	 * Returns whether the given resource is accessible. Files and folders are
	 * always considered accessible and a project is accessible if it is open.
	 * 
	 * @param resource
	 *            the resource
	 * @return <code>true</code> if the resource is accessible, and
	 *         <code>false</code> if it is not
	 */
	private boolean isAccessible(IResource resource) {
		switch (resource.getType()) {
		case IResource.FILE:
			return true;
		case IResource.FOLDER:
			return true;
		case IResource.PROJECT:
			return ((IProject) resource).isOpen();