avocado> var Graph = require("graph").Graph;

avocado> g = new Graph("graph", "vertices", "edges");

avocado> v1 = g.addVertex();
Vertex(<graph>, "153246:2310672")

avocado> v2 = g.addVertex(); 
Vertex(<graph>, "153246:2310673")

avocado> e = g.addEdge(v1, v2);
Edge(<graph>, "3999653:7197720")

avocado> v1.edges();
[  Edge(<graph>, "3999653:7197720") ]

avocado> v2.edges();
[  Edge(<graph>, "3999653:7197720") ]