diff --git a/core/modules/views/src/Plugin/views/field/FieldHandlerInterface.php b/core/modules/views/src/Plugin/views/field/FieldHandlerInterface.php
index 494c333..01769b5 100644
--- a/core/modules/views/src/Plugin/views/field/FieldHandlerInterface.php
+++ b/core/modules/views/src/Plugin/views/field/FieldHandlerInterface.php
@@ -167,7 +167,7 @@ public function preRender(&$values);
    * @param \Drupal\views\ResultRow $values
    *   The values retrieved from a single row of a view's query result.
    *
-   * @return string
+   * @return string|\Drupal\Component\Utility\SafeStringInterface
    *   The rendered output.
    *
    */
@@ -202,7 +202,7 @@ public function postRender(ResultRow $row, $output);
    * @param \Drupal\views\ResultRow $values
    *   The values retrieved from a single row of a view's query result.
    *
-   * @return string
+   * @return string|\Drupal\Component\Utility\SafeStringInterface
    *   The advanced rendered output.
    *
    */
@@ -237,7 +237,7 @@ public function isValueEmpty($value, $empty_zero, $no_skip_empty = TRUE);
    *     - html: Make sure that the html is correct.
    *
    * @return string|\Drupal\Component\Utility\SafeStringInterface
-   *   The rendered output, or a SafeString object.
+   *   The rendered output.
    */
   public function renderText($alter);
 
@@ -280,7 +280,7 @@ public function getRenderTokens($item);
    * @param \Drupal\views\ResultRow $values
    *   Holds single row of a view's result set.
    *
-   * @return string|false
+   * @return string|\Drupal\Component\Utility\SafeStringInterface
    *   Returns rendered output of the given theme implementation.
    */
   function theme(ResultRow $values);