* cache. By default, this method will produce a unique prefix per site using
* the hash salt. If the setting 'apcu_ensure_unique_prefix' is set to FALSE
* then if the caller does not provide a $site_path only the Drupal root will
- * be used. This allows WebTestBase to use the same prefix ensuring that the
- * number of APCu items created during a full test run is kept to a minimum.
+ * be used. This allows tests to use the same prefix ensuring that the number
+ * of APCu items created during a full test run is kept to a minimum.
* Additionally, if a multi site implementation does not use site specific
* module directories setting apcu_ensure_unique_prefix would allow the sites
* to share APCu cache items.
*
* @return string
* The prefix for APCu user cache keys.
+ *
+ * @see https://www.drupal.org/project/drupal/issues/2926309
*/
public static function getApcuPrefix($identifier, $root, $site_path = '') {
if (static::get('apcu_ensure_unique_prefix', TRUE)) {