diff --git a/core/modules/contact/lib/Drupal/contact/Plugin/views/field/ContactLink.php b/core/modules/contact/lib/Drupal/contact/Plugin/views/field/ContactLink.php
index 4a9a238..0047b2e 100644
--- a/core/modules/contact/lib/Drupal/contact/Plugin/views/field/ContactLink.php
+++ b/core/modules/contact/lib/Drupal/contact/Plugin/views/field/ContactLink.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\contact\Plugin\views\field\ContactLink.
+ * Contains \Drupal\contact\Plugin\views\field\ContactLink.
  */
 
 namespace Drupal\contact\Plugin\views\field;
@@ -22,6 +22,9 @@
  */
 class ContactLink extends Link {
 
+  /**
+   * Overrides \Drupal\user\Plugin\views\field\Link::init().
+   */
   public function buildOptionsForm(&$form, &$form_state) {
     $form['text']['#title'] = t('Link label');
     $form['text']['#required'] = TRUE;
@@ -29,15 +32,20 @@ public function buildOptionsForm(&$form, &$form_state) {
     parent::buildOptionsForm($form, $form_state);
   }
 
-  // An example of field level access control.
-  // We must override the access method in the parent class, as that requires
-  // the 'access user profiles' permission, which the contact form does not.
+  /**
+   * Overrides \Drupal\user\Plugin\views\field\Link::access().
+   *
+   * We must override the access method in the parent class, as that requires
+   * the 'access user profiles' permission, which the contact form does not.
+   */
   public function access() {
     return user_access('access user contact forms');
   }
 
-  function render_link($data, $values) {
-    global $user;
+  /**
+   * Overrides \Drupal\user\Plugin\views\field\Link::render_link().
+   */
+  public function render_link($data, $values) {
     $uid = $this->get_value($values, 'uid');
 
     if (empty($uid)) {