I could not find a way (yet) of somehow lazy load the sub-tasks based on clicking the current task.
For that to happen, it has to show a dropdown (we can base it on a `childCount` property or something) in the parent tasks which should allow showing the arrow.
Upon clicking the arrow, we should emit an event from the Gantt chart so we (or the developers) can load the children and append to the parent item's subtasks.
Is this already possible? I couldn't find documentation on this, unfortunately :)
Thanks in advance.