import { attribute } from "https://deno.land/x/graphviz@v0.2.1/mod.ts";
const { constraint } = attribute;
If false, the edge is not used in ranking the nodes. For example, in the graph
digraph G {
a -> c;
a -> b;
b -> c [constraint=false];
}
the edge b -> c
does not add a constraint during rank assignment, so the only constraints are that a be above b and c, yielding the graph: