test creation test creat check uml model helper creat releas model extens mechan factori testabl model element extens mechan factori em factori model extens mechan factori object model model model manag factori creat model object stereo em factori build stereotyp mystereo model em factori build tag definit dx stereo model fail illeg build tag definit sterotyp model didn except illeg argument except expect em factori build tag definit td stereo em factori build tag definit td stereo collect td model model manag helper model element kind model model meta type tag definit equal tag definit delet td size 