Gantt new feature request change places of rows by dragging

With the new feature the user shall be able to change places of the complete rows by dragging in charts with parent (below example)

Today not supported in any chart but we need it with parent. Or if this is not possible at least draggableY: true should work for parent charts so that you can write this functionality yourself using the drag event. This is a basic feature in any gantt.

Example Chart where this should be implemented
https://jsfiddle.net/JohanBrodin/Loq38vk4/