diff --git a/core/modules/contextual/src/Element/ContextualLinks.php b/core/modules/contextual/src/Element/ContextualLinks.php
index 5cf8cab..ba0c34d 100644
--- a/core/modules/contextual/src/Element/ContextualLinks.php
+++ b/core/modules/contextual/src/Element/ContextualLinks.php
@@ -15,6 +15,7 @@
  * @FormElement("contextual_links")
  */
 class ContextualLinks extends FormElement {
+
   /**
    * {@inheritdoc}
    */
@@ -38,7 +39,7 @@ public function getInfo() {
   /**
    * Pre-render callback: Builds a renderable array for contextual links.
    *
-   * @param $element
+   * @param array $element
    *   A renderable array containing a #contextual_links property, which is a
    *   keyed array. Each key is the name of the group of contextual links to
    *   render (based on the 'group' key in the *.links.contextual.yml files for
@@ -57,10 +58,10 @@ public function getInfo() {
    *     ))
    *   @endcode
    *
-   * @return
+   * @return array
    *   A renderable array representing contextual links.
    */
-  public static function preRenderLinks($element) {
+  public static function preRenderLinks(array $element) {
     // Retrieve contextual menu links.
     $items = array();
 
@@ -105,4 +106,5 @@ public static function preRenderLinks($element) {
   public static function getLinksManager() {
     return \Drupal::service('plugin.manager.menu.contextual_link');
   }
+
 }
diff --git a/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php b/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
index e9500eb..7d053c3 100644
--- a/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
+++ b/core/modules/contextual/src/Element/ContextualLinksPlaceholder.php
@@ -16,6 +16,7 @@
  * @FormElement("contextual_links_placeholder")
  */
 class ContextualLinksPlaceholder extends FormElement {
+
   /**
    * {@inheritdoc}
    */
@@ -36,17 +37,17 @@ public function getInfo() {
    * contains an identifier ("contextual id"), which allows the JavaScript of the
    * drupal.contextual-links library to dynamically render contextual links.
    *
-   * @param $element
+   * @param array $element
    *   A structured array with #id containing a "contextual id".
    *
-   * @return
+   * @return array
    *   The passed-in element with a contextual link placeholder in '#markup'.
    *
    * @see _contextual_links_to_id()
-   * @see contextual_element_info()
    */
-  public static function preRenderPlaceholder($element) {
+  public static function preRenderPlaceholder(array $element) {
     $element['#markup'] = '<div' . new Attribute(array('data-contextual-id' => $element['#id'])) . '></div>';
     return $element;
   }
+
 }