- id (string)
- data (object) - original object (from DayPilot.Scheduler.resources[])
- name (string)
- start (DayPilot.Date)
- calendar (DayPilot.Scheduler)
- hidden (boolean)
- level (number) - row level in the tree hierarchy
- grid ("main" | "top" | "bottom") - since 2020.1.4205