title: Add an image/icon beside treenavigator items
body: <p>I have a syncfusion treenavigator dropdown menu. Our client wants to add an icon per item in the first 2 drilldowned menus of the treenavigator. Given that the list of the items came from a deserialized json object, how do I map and inject the images without adding it in the json file? My colleague suggested to create an item template in code behind but I'm not sure how to do it. </p>
  
  <p>P.S. Please do not put this on hold. It's hard to formulate a question if you can't fully understand what you need to ask. I'll try to answer any clarifications.</p>
  
  <p>Thanks!</p>