f),g,k,new mxPoint(a.getCenterX(),a.getCenterY())),e=f.x,f=f.y)}return a.view.graph.getModel().isEdge(a.cell),new mxRectangle(Math.round(e-b/2*d),Math.round(f-c/2*d),Math.round(b*d),Math.round(c*d))}return null};