diff --git a/core/core.services.yml b/core/core.services.yml
index 022fa7e..1cfed64 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -117,6 +117,8 @@ services:
   config.typed:
     class: Drupal\Core\Config\TypedConfigManager
     arguments: ['@config.storage', '@config.storage.schema', '@cache.discovery']
+    tags:
+      - { name: plugin_manager_cache_clear }
   context.handler:
     class: Drupal\Core\Plugin\Context\ContextHandler
     arguments: ['@typed_data_manager']
diff --git a/core/modules/config_translation/config_translation.api.php b/core/modules/config_translation/config_translation.api.php
index 20d7097..27c89b1 100644
--- a/core/modules/config_translation/config_translation.api.php
+++ b/core/modules/config_translation/config_translation.api.php
@@ -89,24 +89,5 @@ function hook_config_translation_info_alter(&$info) {
 }
 
 /**
- * Alter config typed data definitions.
- *
- * Used to automatically generate translation forms, you can alter the typed
- * data types representing each configuration schema type to change default
- * labels or form element renderers.
- *
- * @param $definitions
- *   Associative array of configuration type definitions keyed by schema type
- *   names. The elements are themselves array with information about the type.
- */
-function hook_config_schema_info_alter(&$definitions) {
-  // Enhance the text and date type definitions with classes to generate proper
-  // form elements in ConfigTranslationFormBase. Other translatable types will
-  // appear as a one line textfield.
-  $definitions['text']['form_element_class'] = '\Drupal\config_translation\FormElement\Textarea';
-  $definitions['date_format']['form_element_class'] = '\Drupal\config_translation\FormElement\DateFormat';
-}
-
-/**
  * @} End of "addtogroup hooks".
  */
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index 2eef874..f0b21a0 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -2833,6 +2833,25 @@ function hook_config_import_steps_alter(&$sync_steps, \Drupal\Core\Config\Config
 }
 
 /**
+ * Alter config typed data definitions.
+ *
+ * For example you can alter the typed data types representing each
+ * configuration schema type to change default labels or form element renderers
+ * used for configuration translation.
+ *
+ * @param $definitions
+ *   Associative array of configuration type definitions keyed by schema type
+ *   names. The elements are themselves array with information about the type.
+ */
+function hook_config_schema_info_alter(&$definitions) {
+  // Enhance the text and date type definitions with classes to generate proper
+  // form elements in ConfigTranslationFormBase. Other translatable types will
+  // appear as a one line textfield.
+  $definitions['text']['form_element_class'] = '\Drupal\config_translation\FormElement\Textarea';
+  $definitions['date_format']['form_element_class'] = '\Drupal\config_translation\FormElement\DateFormat';
+}
+
+/**
  * @} End of "addtogroup hooks".
  */