D'n'd and resize for summarized tasks

I love having tasks summarized in one row and found this sample:
docs.dhtmlx.com/gantt/samples/04 … aying.html

It is also possible to add “task_id”, “

” and
element s on summarized tasks to enable dragging and resizing of summarized tasks.

However this all worked fine with previous versions of gantt control (until version 4.0.0). Can someone help me solve this to work with latest version of gantt control?


Can you please provide a working demo of such config (for the version that had supported it), so we could investigate the issue?

I will send live demo url as a private message to you .