The splitParent() method returns the split parent of a JavaScript Scheduler row. This method applies to split resources only.
DayPilotDayPilot.Row.splitParent();Returns the DayPilot.Row object that represents the split parent row.
If the row doesn't have a split parent, the method returns null.
const splitParentId = scheduler.rows.find("A")?.splitParent()?.id;