code: function updatePathHandles(parent) {
  	var handles = parent._handles,
  		handle, h;
  	if (handles) {
  		// Move handles when dragging
  		for (h = 0; h < handles.length; h += 1) {
  			handle = handles[h];
  			handle.x = parent[handle._xProp] + parent.x;
  			handle.y = parent[handle._yProp] + parent.y;
  		}
  	}
  	updatePathGuides(parent);
  }
docs: Update position of handles according to coordinates and dimensions of path layer