def METHOD_NAME(self, widget, path, col):
    if path is None:
        return
    else:
        pieces = ENDGAMES[path[0]][0].lower()
        conf.set("categorycombo", ENDGAME)
        from pychess.widgets.TaskerManager import learn_tasker
        learn_tasker.learn_combo.set_active(path[0])
        start_endgame_from(pieces)