diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
index 2ea3336d934..c906877dc7a 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/filter/FilterPluginBase.php
@@ -1252,7 +1252,7 @@ abstract class FilterPluginBase extends HandlerBase {
    * as widget, and therefore has to be applied several times, one per
    * item selected.
    */
-  function group_multiple_exposed_input(&$input) {
+  public function groupMultipleExposedInput(&$input) {
     if (!empty($input[$this->options['group_info']['identifier']])) {
     return array_filter($input[$this->options['group_info']['identifier']]);
     }
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index dbb0cb9d010..18471d581e1 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -1111,7 +1111,7 @@ class ViewExecutable {
       if (!empty($handlers[$id]) && is_object($handlers[$id])) {
         $multiple_exposed_input = array(0 => NULL);
         if ($handlers[$id]->multipleExposedInput()) {
-          $multiple_exposed_input = $handlers[$id]->group_multiple_exposed_input($this->exposed_data);
+          $multiple_exposed_input = $handlers[$id]->groupMultipleExposedInput($this->exposed_data);
         }
         foreach ($multiple_exposed_input as $group_id) {
           // Give this handler access to the exposed filter input.