mxGraphModel.prototype.createId=function(a){a=this.nextId;this.nextId++;return this.prefix+a+this.postfix};mxGraphModel.prototype.updateEdgeParents=function(a,b){b=b||this.getRoot(a);for(var c=this.getChildCount(a),d=0;d<c;d++){var e=this.getChildAt(a,d);this.updateEdgeParents(e,b)}e=this.getEdgeCount(a);c=[];for(d=0;d<e;d++)c.push(this.getEdgeAt(a,d));for(d=0;d<c.length;d++)a=c[d],this.isAncestor(b,a)&&this.updateEdgeParent(a,b)};