title: How to address an Image in Fabric.js
body: <p>Sorry for the maybe stupid question. I start to get my head into Fabric.js, but it´s hard for me because of the documentation.</p>
  
  <p>Please look at the code below:</p>
  
  <pre><code>  var canvas = new fabric.Canvas('c');
    var iminst = new fabric.Image.fromURL ('./images/1stback.jpg', function(myimage){
       myimage.left=0;
       myimage.top=0;
       canvas.add(myimage);
    });
  
    iminst.set('angle', 45);
  </code></pre>
  
  <p>The image is loaded and shown, but how do I address it afterwards. 
  I just get an Error 
  "TypeError: 'undefined' is not a function (evaluating 'iminst.set('angle', 45)')"</p>