action perform action event action perform sourc uml combo box uml combo box sourc uml combo box sourc object assoc sourc select item object ar sourc target model facad base ar assoc base set assoc check need setbas give except defin collaborationdiagram defin sequencediagram lp collaborationdiagram granular type statement lp sequencediagram granular type statement lp collaborationdiagram local end method lp sequencediagram local end method model facad associ assoc model facad associ role ar model collabor helper set base ar assoc endif 