argument plugins

Closes #3491513

core/modules/comment/src/Plugin/views/argument/UserUid.php

@@ -51,6 +51,9 @@ public static function create(ContainerInterface $container, array $configuratio
     return new static($configuration, $plugin_id, $plugin_definition, $container->get('database'));
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function title() {
     if (!$this->argument) {
       $title = \Drupal::config('user.settings')->get('anonymous');
@@ -65,6 +68,9 @@ public function title() {
     return $title;
   }
 
+  /**
+   * {@inheritdoc}
+   */
   protected function defaultActions($which = NULL) {
     // Disallow summary views on this argument.
     if (!$which) {
@@ -79,6 +85,9 @@ protected function defaultActions($which = NULL) {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function query($group_by = FALSE) {
     $this->ensureMyTable();