mxGraph.prototype.orderCells=function(a,b,c){null==b&&(b=mxUtils.sortCells(this.getEditableCells(this.getSelectionCells()),!0));this.model.beginUpdate();try{this.cellsOrdered(b,a,c),this.fireEvent(new mxEventObject(mxEvent.ORDER_CELLS,"back",a,"cells",b,"increment",c))}finally{this.model.endUpdate()}return b};