action perform action event action perform sourc uml combo box uml combo box sourc uml combo box sourc object target sourc target object valu sourc select item select valu clear repres oper model facad oper valu valu 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 repres oper target valu model collabor helper set repres oper target valu endif 