node-dijkstra symbols

const Graph = require('node-dijkstra'); const A = Symbol('A'); const B = Symbol('B'); const C = Symbol('C'); const a = new Map(); a.set(B, 1); a.set(C, 2); const b = new Map(); b.set(A, 2); const graph = new Map(); graph.set(A, a); graph.set(B, b); const route = new Graph(graph); route.path(A, B);