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/src/org/eclipse/ui/ide/undo/ResourceDescription.java
/**
	 * Record the appropriate state of this resource description using
	 * any available resource history.
	 * 
	 * @param resource
	 *            the resource whose state is to be recorded.
	 * @param monitor
	 *            the progress monitor to be used
	 * @throws CoreException
	 */
	public abstract void recordStateFromHistory(IResource resource,
			IProgressMonitor monitor) throws CoreException;
	
	/**
	 * Return a boolean indicating whether this description represents an
	 * existent resource.
	 * 
	 * @param checkMembers
	 *            Use <code>true</code> if members should also exist in order
	 *            for this description to be considered existent. A value of
	 *            <code>false</code> indicates that the existence of members
	 *            does not matter.
	 * 
	 * @return a boolean indicating whether this description represents an
	 *         existent resource.
	 */
	public abstract boolean verifyExistence(boolean checkMembers);
}