--- /dev/null
+<?php
+
+namespace Drupal\early_rendering_controller_test;
+
+use Drupal\Core\Cache\CacheableDependencyInterface;
+use Drupal\Core\Cache\UncacheableDependencyTrait;
+
+class CacheableTestDomainObject extends TestDomainObject implements CacheableDependencyInterface {
+
+ use UncacheableDependencyTrait;
+
+}