code: function loadImage(attrs, fn){
    fn = fn || function(){};
    var img = new Image();
    img.onerror = error(fn, 'failed to load pixel', img);
    img.onload = function(){ fn(); };
    img.src = attrs.src;
    img.width = 1;
    img.height = 1;
    return img;
  }
docs: TODO: Document me
  
  @api private
  @param {Object} attrs
  @param {Function} fn
  @return {undefined}