diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
index 2f83540..16f70d3 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
@@ -808,7 +808,7 @@ function summary_query() {
     // Add the field.
     $this->base_alias = $this->query->add_field($this->tableAlias, $this->realField);
 
-    $this->summary_name_field();
+    $this->summaryNameField();
     return $this->summaryBasics();
   }
 
@@ -816,7 +816,7 @@ function summary_query() {
    * Add the name field, which is the field displayed in summary queries.
    * This is often used when the argument is numeric.
    */
-  function summary_name_field() {
+  protected function summaryNameField() {
     // Add the 'name' field. For example, if this is a uid argument, the
     // name field would be 'name' (i.e, the username).
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ManyToOne.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ManyToOne.php
index 2cb77e0..9d78c1b 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ManyToOne.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ManyToOne.php
@@ -179,7 +179,7 @@ function summary_query() {
     // Add the field.
     $this->base_alias = $this->query->add_field($this->tableAlias, $this->realField);
 
-    $this->summary_name_field();
+    $this->summaryNameField();
 
     return $this->summaryBasics();
   }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/String.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/String.php
index ccb4d54..7532ee3 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/String.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/String.php
@@ -166,7 +166,7 @@ function summary_query() {
       $this->query->set_count_field(NULL, $formula, $this->field, $this->field . '_truncated');
     }
 
-    $this->summary_name_field();
+    $this->summaryNameField();
     return $this->summaryBasics(FALSE);
   }