overrid set except set initi model initi elem model collabor factori creat messag activ object element object model model manag factori creat model object inter model collabor factori creat interact object col model collabor factori creat collabor model collabor helper set context inter col model core helper set namespac col model collabor helper add messag inter elem element activ model collabor factori creat messag model collabor helper add messag inter activ model uml messag activ combo box model model target set target event set object object elem thread helper synchron 