--- /dev/null
+<?php
+
+/**
+ * @file
+ * Install, update and uninstall functions for the Settings Tray module.
+ */
+
+use Drupal\Core\Cache\Cache;
+
+/**
+ * Implements hook_install().
+ */
+function settings_tray_install() {
+ // This module affects the rendering of blocks and of the page.
+ // @todo Remove in https://www.drupal.org/node/2783791.
+ Cache::invalidateTags(['rendered']);
+
+ // \Drupal\Core\Menu\ContextualLinkManager caches per-group definitions
+ // without associating the cache tag that would allow them to be cleared
+ // by its clearCachedDefinitions() implementation that is automatically
+ // invoked when modules are installed.
+ // @todo Remove when that is fixed in https://www.drupal.org/node/2773591.
+ \Drupal::service('cache.discovery')->deleteAll();
+}