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/views/navigator/NavigatorDropAdapter.java
public NavigatorDropAdapter(StructuredViewer viewer) {
        super(viewer);
    }
    /*
     * @see org.eclipse.swt.dnd.DropTargetListener#dragEnter(org.eclipse.swt.dnd.DropTargetEvent)
     */
    public void dragEnter(DropTargetEvent event) {
        if (FileTransfer.getInstance().isSupportedType(event.currentDataType)
                && event.detail == DND.DROP_DEFAULT) {
            
            event.detail = DND.DROP_COPY;
        }
        super.dragEnter(event);
    }
    /**
     * Returns an error status with the given info.
     */
    private IStatus error(String message) {
        return error(message, null);
    }
    /**
     * Returns an error status with the given info.
     */
    private IStatus error(String message, Throwable exception) {
        return new Status(IStatus.ERROR, PlatformUI.PLUGIN_ID, 0, message,
                exception);
    }
    /**
     * Returns the actual target of the drop, given the resource
     * under the mouse.  If the mouse target is a file, then the drop actually