public void Execute(GetRegistrationsRequest request, Action<GetRegistrationsResponse> responseCallback, Action<Exception> exceptionCallback)
        {
            var url = string.Format("https://go.urbanairship.com/api/device_tokens/?Limit={0}&start={1}", request.Limit, request.Start);
            var webRequest = RequestBuilder.Build(url);
            webRequest.Method = "GET";
            webRequest.ContentType = "application/json";

            var asyncRequest = new AsyncRequest
                {
                    ReadFromResponse = stream => responseCallback(GetRegistrationsResponseDeSerializer.DeSerialize(stream)),
                    Request = webRequest,
                    ExceptionCallback = exceptionCallback,
                };
            asyncRequest.Execute();
        }
        public void Integration()
        {
            var service = new GetRegistrationsService
                                      {
                                          RequestBuilder = RequestBuilderHelper.Build()
                                      };

            var helper = new AsyncTestHelper<GetRegistrationsResponse>();
            var request = new GetRegistrationsRequest();
            service.Execute(request, helper.Callback, helper.HandleException);
            helper.Wait();
            var response = helper.Response;
            foreach (var device in response.Devices)
            {
				Debug.WriteLine(device.DeviceToken);
            }
        }