mxGraphLayout.prototype.isAncestor=function(a,b,c){if(!c)return this.graph.model.getParent(b)==a;if(b==a)return!1;for(;null!=b&&b!=a;)b=this.graph.model.getParent(b);return b==a};mxGraphLayout.prototype.isVertexMovable=function(a){return this.graph.isCellMovable(a)};mxGraphLayout.prototype.isVertexIgnored=function(a){return!this.graph.getModel().isVertex(a)||!this.graph.isCellVisible(a)};