overrid set except set elem model collabor factori creat collabor model core helper set elem collabor elem model uml collabor repres classifi combo box model target manag instanc set target elem thread helper synchron project project manag manag current project object root clazz model core factori build model core helper set clazz clazz model collabor helper set repres classifi elem clazz thread helper synchron simul target chang model target set target event object elem thread helper synchron 