overrid end attach fig edg fe end attach fe sequenc diagram graph model gm sequenc diagram graph model editor graph model fig messag fig messag fig messag fe object messag fe owner fig classifi role dcr fig classifi role fe dest fig node fig classifi role scr fig classifi role fe sourc fig node ensur space fig messag fig messag action auto creat messag messag todo mayb messag exist check activ set messag activ skip code sourc messag object messag sourc model facad receiv messag dest messag object messag dest model facad sender messag creat messag modelel interact collabor object messag gm connect messag sourc messag dest model meta type messag model meta type action correct activ valu model collabor helper set activ messag messag layer perspect layer layer perspect editor layer manag activ layer fig messag edg list fig fig layer content fig fig fig fig owner messag edg fig messag fig edg set sourc port fig fe dest port fig edg set sourc fig node dcr edg set dest port fig fe sourc port fig edg set dest fig node scr point point edg point point length todo shouldn hardcod height spline activ height point fe point activ height edg set point point edg self messag edg convert arc mark contain fig poli complet todo think work need gef automat end set set complet method fig poli edg call contain poli fig poli poli fig poli edg fig poli set complet fig messag action fig messag determin activ fig poli poli fig poli fe fig poli set complet dcr creat activ dcr render chang dcr scr scr creat activ scr render chang 