diff --git a/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php b/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
index 12261b4..882e03e 100644
--- a/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
+++ b/core/modules/contextual/src/Plugin/views/field/ContextualLinks.php
@@ -87,15 +87,7 @@ public function preRender(&$values) {
   }
 
   /**
-   * Overrides \Drupal\views\Plugin\views\field\FieldPluginBase::render().
-   *
-   * Renders the contextual fields.
-   *
-   * @param \Drupal\views\ResultRow $values
-   *   The values retrieved from a single row of a view's query result.
-   *
-   * @see contextual_preprocess()
-   * @see contextual_contextual_links_view_alter()
+   * {@inheritdoc}
    */
   public function render(ResultRow $values) {
     $links = array();
diff --git a/core/modules/views/src/Plugin/views/row/OpmlFields.php b/core/modules/views/src/Plugin/views/row/OpmlFields.php
index 4654bca..c965ea8 100644
--- a/core/modules/views/src/Plugin/views/row/OpmlFields.php
+++ b/core/modules/views/src/Plugin/views/row/OpmlFields.php
@@ -212,6 +212,9 @@ public function render($row) {
    *   The index count of the row as expected by views_plugin_style::getField().
    * @param $field_id
    *   The ID assigned to the required field in the display.
+   *
+   * @return \Drupal\Component\Render\MarkupInterface|null
+   *   Array of rendered field values, or NULL if it was empty.
    */
   public function getField($index, $field_id) {
     if (empty($this->view->style_plugin) || !is_object($this->view->style_plugin) || empty($field_id)) {
diff --git a/core/modules/views/src/Plugin/views/row/RssFields.php b/core/modules/views/src/Plugin/views/row/RssFields.php
index 25a75d1..66bd170 100644
--- a/core/modules/views/src/Plugin/views/row/RssFields.php
+++ b/core/modules/views/src/Plugin/views/row/RssFields.php
@@ -197,6 +197,9 @@ public function render($row) {
    *   The index count of the row as expected by views_plugin_style::getField().
    * @param $field_id
    *   The ID assigned to the required field in the display.
+   *
+   * @return \Drupal\Component\Render\MarkupInterface|null
+   *   Array of rendered field values, or NULL if it was empty.
    */
   public function getField($index, $field_id) {
     if (empty($this->view->style_plugin) || !is_object($this->view->style_plugin) || empty($field_id)) {