--- /dev/null
+<?php
+
+namespace Drupal\httpkernel_test\Controller;
+
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * A test controller.
+ */
+class TestController {
+
+ /**
+ * Return an empty response.
+ */
+ public function get() {
+ return new Response();
+ }
+
+}