NativeMethodHandler<T>.optional constructor

NativeMethodHandler<T>.optional(
  1. Future handler(
    1. T?
    ), [
  2. T? asFunc(
    1. dynamic
    )?
])

Implementation

factory NativeMethodHandler.optional(Future Function(T?) handler,
        [T? Function(dynamic)? asFunc]) =>
    NativeMethodHandler._(
      asFunc: asFunc,
      handler: handler,
    );