mxGraph.prototype.removeCellsFromParent=function(a){null==a&&(a=this.getSelectionCells());this.model.beginUpdate();try{var b=this.getDefaultParent(),c=this.model.getChildCount(b);this.cellsAdded(a,b,c,null,null,!0);this.fireEvent(new mxEventObject(mxEvent.REMOVE_CELLS_FROM_PARENT,"cells",a))}finally{this.model.endUpdate()}return a};