如何以编程方式触发fabric.js“ object：modified”事件？

我想以编程方式触发“ object：modified”事件。我已经尝试过“开火”和“触发”方法。

var canvas = new fabric.Canvas('c');

canvas.on("object:modified", function (e) {
    alert("object modified");
});

var text = new fabric.Text('Text', {
  fontFamily: 'Hoefler Text',
  left: 10,
  top: 10
});

canvas.add(text);

$('.fillText').click(function(){
  text.setFill($(this).data('color'));
  canvas.renderAll();

  text.trigger('modified');
});

$('#moveText').click(function(){
  text.setLeft(50);
  text.setTop(50);
  text.setCoords();
  canvas.renderAll();

  text.trigger('modified');
});

https://jsfiddle.net/gb4u85q4/