javascript - joint.jsでJSONを読んでいますか?

Question

joint.js ライブラリで JSON を読み取り、グラフとして表示したい...

var paper = new joint.dia.Paper({
    el: $('#paper'),
    width: 600,
    height: 200,
    model: graph
});

var graph = new joint.dia.Graph;

jsonstring = '{"employees": [ { "firstName":"John" , "lastName":"Doe" }, { "firstName":"Anna" , "lastName":"Smith" }, { "firstName":"Peter" , "lastName":"Jones" } ] }';

graph.fromJSON(JSON.parse(jsonstring));