diff --git a/core/modules/views/lib/Drupal/views/ManyToOneHelper.php b/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
index 1209901..392d3fc 100644
--- a/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
+++ b/core/modules/views/lib/Drupal/views/ManyToOneHelper.php
@@ -46,11 +46,11 @@ public function buildOptionsForm(&$form, &$form_state) {
   /**
    * Sometimes the handler might want us to use some kind of formula, so give
    * it that option. If it wants us to do this, it must set $helper->formula = TRUE
-   * and implement handler->get_formula();
+   * and implement handler->getFormula();
    */
   public function getField() {
     if (!empty($this->formula)) {
-      return $this->handler->get_formula();
+      return $this->handler->getFormula();
     }
     else {
       return $this->handler->tableAlias . '.' . $this->handler->realField;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
index 3f510aa..e629947 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/HandlerBase.php
@@ -174,7 +174,7 @@ public function adminLabel($short = FALSE) {
   public function getField($field = NULL) {
     if (!isset($field)) {
       if (!empty($this->formula)) {
-        $field = $this->get_formula();
+        $field = $this->getFormula();
       }
       else {
         $field = $this->tableAlias . '.' . $this->realField;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
index 6294ee3..414d42d 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
@@ -92,11 +92,11 @@ function get_sort_name() {
   }
 
   /**
-   * Overrides \Drupal\views\Plugin\views\argument\Formula::get_formula().
+   * Overrides \Drupal\views\Plugin\views\argument\Formula::getFormula().
    */
-  function get_formula() {
+  public function getFormula() {
     $this->formula = $this->getDateFormat($this->argFormat);
-    return parent::get_formula();
+    return parent::getFormula();
   }
 
 }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Formula.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Formula.php
index d04982f..64eddc9 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Formula.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Formula.php
@@ -38,7 +38,7 @@ public function init(ViewExecutable $view, DisplayPluginBase $display, array &$o
     }
   }
 
-  function get_formula() {
+  public function getFormula() {
     return str_replace('***table***', $this->tableAlias, $this->formula);
   }
 
@@ -48,7 +48,7 @@ function get_formula() {
   function summary_query() {
     $this->ensureMyTable();
     // Now that our table is secure, get our formula.
-    $formula = $this->get_formula();
+    $formula = $this->getFormula();
 
     // Add the field.
     $this->base_alias = $this->name_alias = $this->query->add_field(NULL, $formula, $this->field);
@@ -64,7 +64,7 @@ public function query($group_by = FALSE) {
     $this->ensureMyTable();
     // Now that our table is secure, get our formula.
     $placeholder = $this->placeholder();
-    $formula = $this->get_formula() .' = ' . $placeholder;
+    $formula = $this->getFormula() .' = ' . $placeholder;
     $placeholders = array(
       $placeholder => $this->argument,
     );
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 139bdd2..cc7a51c 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
@@ -161,7 +161,7 @@ function summary_query() {
     }
     else {
       // Add the field.
-      $formula = $this->get_formula();
+      $formula = $this->getFormula();
       $this->base_alias = $this->query->add_field(NULL, $formula, $this->field . '_truncated');
       $this->query->set_count_field(NULL, $formula, $this->field, $this->field . '_truncated');
     }
@@ -175,7 +175,7 @@ function summary_query() {
    *
    * $this->ensureMyTable() MUST have been called prior to this.
    */
-  function get_formula() {
+  public function getFormula() {
     return "SUBSTRING($this->tableAlias.$this->realField, 1, " . intval($this->options['limit']) . ")";
   }
 
@@ -212,7 +212,7 @@ public function query($group_by = FALSE) {
     }
     else {
       $formula = TRUE;
-      $field = $this->get_formula();
+      $field = $this->getFormula();
     }
 
     if (count($this->value) > 1) {