code: function addPathHandles($canvas, parent) {
  	var key, xProp, yProp;
  	for (key in parent) {
  		if (Object.prototype.hasOwnProperty.call(parent, key)) {
  			// If property is a control point
  			if (key.match(/c?x(\d+)/gi) !== null) {
  				// Get the x and y coordinates for that control point
  				xProp = key;
  				yProp = key.replace('x', 'y');
  				// Add handle at control point
  				addPathHandle($canvas, parent, xProp, yProp);
  			}
  		}
  	}
  	// Add guides connecting handles
  	if (parent.guide) {
  		addPathGuides($canvas, parent);
  	}
  }
docs: Add handles to line path