doWork:_Event_Dynamic_Void<Dynamic ‑> Void> = new Event<Dynamic>()
onComplete:_Event_Dynamic_Void<Dynamic ‑> Void> = new Event<Dynamic>()
onError:_Event_Dynamic_Void<Dynamic ‑> Void> = new Event<Dynamic>()
onProgress:_Event_Dynamic_Void<Dynamic ‑> Void> = new Event<Dynamic>()