properti build attribut object handl object type handl type type type illeg argument except handl type instanc type non nl uml util own attribut type handl unsupport oper except type handl non nl doe support own attribut non nl runnabl run runnabl run properti properti creat attribut uml util own attribut type handl add properti properti set type type type properti set attr param add properti chang command cmd chang command model impl run creat attribut type edit domain command stack execut cmd cmd set object run param handl properti run param 