diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
index 3f510aa..07774ac 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
@@ -185,7 +185,7 @@ public function getField($field = NULL) {
     if ($this->view->display_handler->useGroupBy()) {
       $this->view->initQuery();
       if ($this->query) {
-        $info = $this->query->get_aggregation_info();
+        $info = $this->query->getAggregationInfo();
         if (!empty($info[$this->options['group_type']]['method'])) {
           $method = $info[$this->options['group_type']]['method'];
           if (method_exists($this->query, $method)) {
@@ -322,7 +322,7 @@ public function buildGroupByForm(&$form, &$form_state) {
     $form['#section'] = $display_id . '-' . $type . '-' . $id;
 
     $this->view->initQuery();
-    $info = $this->view->query->get_aggregation_info();
+    $info = $this->view->query->getAggregationInfo();
     foreach ($info as $id => $aggregate) {
       $group_types[$id] = $aggregate['title'];
     }
@@ -864,7 +864,7 @@ public function submitTemporaryForm($form, &$form_state) {
       if (empty($executable->query)) {
         $executable->initQuery();
       }
-      $aggregate = $executable->query->get_aggregation_info();
+      $aggregate = $executable->query->getAggregationInfo();
       if (!empty($aggregate[$item['group_type']]['handler'][$type])) {
         $override = $aggregate[$item['group_type']]['handler'][$type];
       }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php
index 4da5800..0c93f5a 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/display/DisplayPluginBase.php
@@ -878,7 +878,7 @@ public function getHandlers($type) {
           if (empty($this->view->query)) {
             $this->view->initQuery();
           }
-          $aggregate = $this->view->query->get_aggregation_info();
+          $aggregate = $this->view->query->getAggregationInfo();
           if (!empty($aggregate[$info['group_type']]['handler'][$type])) {
             $override = $aggregate[$info['group_type']]['handler'][$type];
           }
@@ -1191,7 +1191,7 @@ public function optionsSummary(&$categories, &$options) {
     }
 
     $this->view->initQuery();
-    if ($this->view->query->get_aggregation_info()) {
+    if ($this->view->query->getAggregationInfo()) {
       $options['group_by'] = array(
         'category' => 'other',
         'title' => t('Use aggregation'),
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/query/QueryPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/query/QueryPluginBase.php
index e78516d..859eb1b 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/query/QueryPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/query/QueryPluginBase.php
@@ -86,7 +86,7 @@ function add_signature(ViewExecutable $view) { }
    *
    * If NULL, aggregation is not allowed.
    */
-  function get_aggregation_info() { }
+  public function getAggregationInfo() { }
 
   public function validateOptionsForm(&$form, &$form_state) { }
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
index 3f7c8bd..e1cf17f 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
@@ -1204,7 +1204,7 @@ function compile_fields($query) {
       }
 
       if (!empty($field['function'])) {
-        $info = $this->get_aggregation_info();
+        $info = $this->getAggregationInfo();
         if (!empty($info[$field['function']]['method']) && is_callable(array($this, $info[$field['function']]['method']))) {
           $string = $this::$info[$field['function']]['method']($field['function'], $string);
           $placeholders = !empty($field['placeholders']) ? $field['placeholders'] : array();
@@ -1647,7 +1647,7 @@ function add_signature(ViewExecutable $view) {
     $view->query->add_field(NULL, "'" . $view->storage->id() . ':' . $view->current_display . "'", 'view_name');
   }
 
-  function get_aggregation_info() {
+  public function getAggregationInfo() {
     // @todo -- need a way to get database specific and customized aggregation
     // functions into here.
     return array(
diff --git a/core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItem.php b/core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItem.php
index e35cee0..b047507 100644
--- a/core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItem.php
+++ b/core/modules/views_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItem.php
@@ -217,7 +217,7 @@ public function submitForm(array &$form, array &$form_state) {
       if (empty($executable->query)) {
         $executable->initQuery();
       }
-      $aggregate = $executable->query->get_aggregation_info();
+      $aggregate = $executable->query->getAggregationInfo();
       if (!empty($aggregate[$item['group_type']]['handler'][$type])) {
         $override = $aggregate[$item['group_type']]['handler'][$type];
       }