title: Adding IDs to Fabric.js elements
body: <p>I am creating a 'map like' application in Canvas using the Fabric.js library.  I essentially put an image down and then lay circles on top of the image with the correct coordinates.  The dot locations and names come through as JSON data received from an ajax call. I need a way to refer to any individual circle so that I can fetch more information regarding that circle (each circle has a popup with more detailed information).</p>
  
  <p>I can't find anywhere in the documentation that explains how to do this, I have tried adding an ID to an object like this: </p>
  
  <p><code>tokens.add(new fabric.Circle({ radius: 25, fill: '#f55', top: 100, left: 70, id: "foo" }));</code></p>
  
  <p>with no luck retrieving it.  Any help would be greatly appreciated.  Also this is my first interaction with this community, so I apologize if my question isn't detailed enough, or if there is some other problem with it.</p>