mxGraphModel.prototype.setCreateIds=function(a){this.createIds=a};mxGraphModel.prototype.createRoot=function(){var a=new mxCell;a.insert(new mxCell);return a};mxGraphModel.prototype.getCell=function(a){return null!=this.cells?this.cells[a]:null};mxGraphModel.prototype.filterCells=function(a,b){var c=null;if(null!=a){c=[];for(var d=0;d<a.length;d++)b(a[d])&&c.push(a[d])}return c};mxGraphModel.prototype.getDescendants=function(a){return this.filterDescendants(null,a)};