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/wizards/datatransfer/ImportOperation.java
IContainer getDestinationContainerFor(Object fileSystemObject)
            throws CoreException {
        IPath pathname = new Path(provider.getFullPath(fileSystemObject));
        if (createContainerStructure) {
			return createContainersFor(pathname.removeLastSegments(1));
		}
        if (source == fileSystemObject) {
			return null;
		}
        IPath sourcePath = new Path(provider.getFullPath(source));
        IPath destContainerPath = pathname.removeLastSegments(1);
        IPath relativePath = destContainerPath.removeFirstSegments(
                sourcePath.segmentCount()).setDevice(null);
        return createContainersFor(relativePath);
        
    }
    /**
     * Returns the resource either casted to or adapted to an IFile. 
     * 
     * @param resource resource to cast/adapt
     * @return the resource either casted to or adapted to an IFile.
     * 	<code>null</code> if the resource does not adapt to IFile 
     */
    IFile getFile(IResource resource) {
        if (resource instanceof IFile) {
            return (IFile) resource;
        }
        Object adapted = ((IAdaptable) resource).getAdapter(IFile.class);
        if(adapted == null) {
			return null;