creat draggabl label associ overridden subclass chang behaviour todo consid introduc fig edg model element us edg param owner own uml element param set render set creat label object owner diagram set set middl group fig text group owner set let us group construct differ text section associ fig middl group add fig fig middl group add fig stereotyp fig add path item middl group path item placement middl group argo fig util mark posit color yellow 