title: Show display the label of a 'dot' node at the center in vis network
body: <p>I am trying to build an animation using vis.js network. In one part, I need to show the value of a node at the center of the node.</p>
  <p>Thus, I have convert the value of a node to its label. However, since I also resize the node, I have to use the dot node type. Here is an example of what I have here:</p>
  <pre><code>var nodes = new vis.DataSet([
      {id: 1, value:1, label: '1'},
      {id: 2, value:2, label: '2'},
      {id: 3, value:3, label: '3'},
      {id: 4, value:4, label: '4'},
      {id: 5, value:5, label: '5'}
  ]);
  </code></pre>
  <pre><code>var options = {
      nodes:{
          shape: &quot;dot&quot;,
          scaling: {
              customScalingFunction: function (min, max, total, value){
                  return value/total
              },
              min: 5,
              max: 150,
          }
      }
  };
  </code></pre>
  <p>Would appreciate if anyone can help.</p>