TIWCGJQSchedulerOptions.OnBeforeRequestData Property
Fired before any ajax request is sent. Argument stage = 1 for retrieving events, 2 - adding event, 3 - removiing event, 4 - update event.
published property OnBeforeRequestData: TIWCGJSonFunc index 15 read GetFuncValue write SetFuncValue stored IsFuncStored;