diff --git a/core/modules/statistics/src/StatisticsDatabaseStorage.php b/core/modules/statistics/src/StatisticsDatabaseStorage.php
index b97b89f..2585a88 100644
--- a/core/modules/statistics/src/StatisticsDatabaseStorage.php
+++ b/core/modules/statistics/src/StatisticsDatabaseStorage.php
@@ -20,7 +20,7 @@ class StatisticsDatabaseStorage implements StatisticsStorageInterface {
    * @var \Drupal\Core\State\StateInterface
    */
   protected $state;
-  
+
   /**
   * Construct the statistics storage.
   *
@@ -99,21 +99,8 @@ public function maxTotalCount() {
   }
 
   /**
-   * Returns the most viewed content of all time, today, or the last-viewed node.
-   *
-   * @param string $dbfield
-   *   The database field to use, one of:
-   *   - 'totalcount': Integer that shows the top viewed content of all time.
-   *   - 'daycount': Integer that shows the top viewed content for today.
-   *   - 'timestamp': Integer that shows only the last viewed node.
-   * @param int $dbrows
-   *   The number of rows to be returned.
-   *
-   * @return SelectQuery|FALSE
-   *   A query result containing the node ID, title, user ID that owns the node,
-   *   and the username for the selected node(s), or FALSE if the query could not
-   *   be executed correctly.
-   */
+  * {@inheritdoc}
+  */
   public function statisticsTitleList($dbfield, $dbrows) {
     if (in_array($dbfield, array('totalcount', 'daycount', 'timestamp'))) {
       $query = $this->connection->select('node_field_data', 'n');
diff --git a/core/modules/statistics/src/StatisticsStorageInterface.php b/core/modules/statistics/src/StatisticsStorageInterface.php
index e5243e9..7e875c9 100644
--- a/core/modules/statistics/src/StatisticsStorageInterface.php
+++ b/core/modules/statistics/src/StatisticsStorageInterface.php
@@ -76,4 +76,25 @@ public function resetDayCount();
    */
   public function maxTotalCount();
 
+  /**
+   * Returns the most viewed content of all time, today, or the last-viewed node.
+   * Used primarily in StatisticsPopularBlock and passed to node_title_list.
+   *
+   * @todo Offer more helpers for generating the database result object to node_title_list.
+   *
+   * @param string $dbfield
+   *   The database field to use, one of:
+   *   - 'totalcount': Integer that shows the top viewed content of all time.
+   *   - 'daycount': Integer that shows the top viewed content for today.
+   *   - 'timestamp': Integer that shows only the last viewed node.
+   * @param int $dbrows
+   *   The number of rows to be returned.
+   *
+   * @return SelectQuery|FALSE
+   *   A query result containing the node ID, title, user ID that owns the node,
+   *   and the username for the selected node(s), or FALSE if the query could not
+   *   be executed correctly.
+   */
+  public function statisticsTitleList($dbfield, $dbrows);
+
 }
diff --git a/core/modules/statistics/statistics.module b/core/modules/statistics/statistics.module
index 5e969d4..4d845ea 100644
--- a/core/modules/statistics/statistics.module
+++ b/core/modules/statistics/statistics.module
@@ -79,7 +79,7 @@ function statistics_cron() {
 /**
  * Returns the most viewed content of all time, today, or the last-viewed node.
  *
- * @deprecated in Drupal 8.0.x
+ * @deprecated in Drupal 8.0.x, use statisticsTitleList in statistics_storage service.
  */
 function statistics_title_list($dbfield, $dbrows) {
   return \Drupal::service('statistics.statistics_storage')->statisticsTitleList($dbfield, $dbrows);
@@ -88,7 +88,7 @@ function statistics_title_list($dbfield, $dbrows) {
 /**
  * Retrieves a node's "view statistics".
  *
- * @deprecated in Drupal 8.0.x
+ * @deprecated in Drupal 8.0.x, use fetchViews in statistics_storage service.
  */
 function statistics_get($nid) {
   if ($nid > 0) {