code: function addHandles(parent) {
  	var $canvas = $(parent.canvas);
  
  	// If parent's list of handles doesn't exist
  	if (parent._handles === undefined) {
  		// Create list to store handles
  		parent._handles = [];
  	}
  
  	if (isRectLayer(parent)) {
  		// Add four handles to corners of a rectangle/ellipse/image
  		addRectHandles($canvas, parent);
  	} else if (isPathLayer(parent)) {
  		// Add two or more handles to a line path
  		addPathHandles($canvas, parent);
  	}
  }
docs: Add drag handles to all four corners of rectangle layer