import { attribute } from "https://deno.land/x/graphviz@v0.2.1/attribute.ts";
const { peripheries } = attribute;
Set number of peripheries used in polygonal shapes and cluster boundaries. Note that user-defined shapes are treated as a form of box shape, so the default peripheries value is 1 and the user-defined shape will be drawn in a bounding rectangle. Setting peripheries=0 will turn this off. Also, 1 is the maximum peripheries value for clusters.