GMAutoRetryControlleExampler.m

- (void)_fetchSomethingOrDieWithCompletion:(void (^)(id something))completion {
    _autoRetryController = [[[GMURLAutoRetryController alloc] initWithBlock:^(GMAutoRetryController * _Nonnull controller) {
        [/* start request with */ completion:^(id __nullable something, NSError * __nullable error) {
            if (error) {
                [controller scheduleAutoRetryWithError:error];
            } else {
                completion(something);
            }
        }];
    }] resume];
}