overrid set enclos fig fig enclos owner object comp owner enclos object node comp enclos owner model facad node instanc node comp model facad node instanc comp node comp model common behavior helper set node instanc comp node comp set enclos fig enclos model facad compon instanc node comp model facad compon instanc comp node comp model common behavior helper set compon instanc comp node comp set enclos fig enclos model facad node node comp set enclos fig enclos layer element order figur list content arrai list layer content iter content iter object fig edg model element fig edg model element figedg fig edg model element figedg layer bring figedg visibl visibl like delet todo indic fundament problem investig tfm enclos enclos fig model facad node instanc comp model common behavior helper set node instanc comp model facad compon instanc comp model common behavior helper set compon instanc comp set enclos fig enclos 