title: Accessing node data in vis.js click handler
body: <p>I have a network graph of nodes and edges and would like to get the node data once it gets clicked. e.g,</p>
  <pre><code>var network = new vis.Network(container, data, options);
  network.on( 'click', function(properties) {
      console.log('clicked node ' + properties.nodes);
  });
  </code></pre>
  <p>But this just returns some internal id [105]. Is there a way to get the actual data that is associated with the node?</p>