updat minimum height classifi role fig messag ad remov updat minimum height max list fig edg fig edg edg fig messag creat messag creat fig messag todo line safe happen just comment edg comment edg singl messag fig edg size creat messag todo magic number descript constant minimum height head fig minimum size height offset fig fig fig edg fig fig messag need edg complet fig messag fig dest fig node fig messag fig sourc fig node fig messag fig max max fig messag fig todo magic number descript constant minimum height max 