title: Sigma JS - Customs Icon Image on nodes
body: <p>i try refer to the example on <a href="https://stackoverflow.com/questions/33810127/use-custom-images-on-nodes-in-sigma-js">Use custom images on nodes in Sigma js</a></p>
  <p>but i keep having error on 'Uncaught ReferenceError: images is not defined', wonder anyone can advice me on how to fix it and able to display the icon on the nodes</p>