object
  method dispose : unit Js.meth
  method disposeInternal : unit Js.meth
  method fire : unit Js.meth
  method fireIfActive : unit Js.meth
  method getDisposed : bool Js.t Js.meth
  method isActive : bool Js.t Js.meth
  method isDisposed : bool Js.t Js.meth
  method start : int Js.opt -> unit Js.meth
  method stop : unit Js.meth
end