overrid action old step possibl constructor action old step old step choic step choic step select index choic illeg argument except select stereotyp path chosen object oper model element need stereotyp creat base behavior featur model creat object model facad model oper object stereotyp iter iter model facad own element iter iter object candid iter model facad stereotyp candid creat equal model facad candid collect base class model facad base class candid iter iter base class base class iter iter behavior featur equal iter stereotyp candid stereotyp stereotyp model extens mechan factori build stereotyp creat model core helper set stereotyp creat stereotyp set stereotyp model extens mechan helper add base stereotyp behavior featur object target ns namespac model facad namespac oper model facad model oper model core helper add own element target ns stereotyp creat stereotyp stereotyp model core helper add stereotyp oper stereotyp ad creat stereotyp except pve defin log lp log granular type statement lp log local nest statement lp log local nest ifdef cognit log error set stereotyp pve endif stereotyp path chosen stereotyp path chosen action 