gObjectNew but also initializes the object asyncronously.gAsyncInitableNewAsync(object.type, io.priority, cancellable, callback, user.data, ...)GType supporting GAsyncInitable.GCancellable object, NULL to ignore.GAsyncReadyCallback to call when the initialization is
finishedNULL.callback will be called. You can
then call gAsyncInitableNewFinish to get new object and check for
any errors.
Since 2.22