diff --git a/core/modules/field/lib/Drupal/field/Plugin/views/field/Field.php b/core/modules/field/lib/Drupal/field/Plugin/views/field/Field.php
index 60b67e7c91b..71cdd359398 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/views/field/Field.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/views/field/Field.php
@@ -643,7 +643,7 @@ class Field extends FieldPluginBase {
   /**
    * Return an array of items for the field.
    */
-  function get_items($values) {
+  protected function getItems($values) {
     $original_entity = $this->get_entity($values);
     if (!$original_entity) {
       return array();
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php
index bd3c0d1c4e7..8019cf6bf25 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php
@@ -1111,7 +1111,7 @@ If you would like to have the characters \'[\' and \']\' use the html entity cod
    */
   public function advancedRender($values) {
     if ($this->allowAdvancedRender() && method_exists($this, 'render_item')) {
-      $raw_items = $this->get_items($values);
+      $raw_items = $this->getItems($values);
       // If there are no items, set the original value to NULL.
       if (empty($raw_items)) {
         $this->original_value = NULL;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/field/PrerenderList.php b/core/modules/views/lib/Drupal/views/Plugin/views/field/PrerenderList.php
index e47771d8087..4e43e765c15 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/field/PrerenderList.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/field/PrerenderList.php
@@ -100,7 +100,7 @@ class PrerenderList extends FieldPluginBase {
    * is to be made. Additionally, items that might be turned into tokens
    * should also be in this array.
    */
-  function get_items($values) {
+  protected function getItems($values) {
     $field = $this->getValue($values);
     if (!empty($this->items[$field])) {
       return $this->items[$field];