diff --git a/core/lib/Drupal/Core/Batch/Batch.php b/core/lib/Drupal/Core/Batch/Batch.php
index 688764c..03ee311 100644
--- a/core/lib/Drupal/Core/Batch/Batch.php
+++ b/core/lib/Drupal/Core/Batch/Batch.php
@@ -7,8 +7,8 @@
  *
  * Example code to create a batch:
  * @code
- * $batch = Batch::create('Batch Title')
- *   ->setTitle('Title can be changed.')
+ * $batch = Batch::create()
+ *   ->setTitle('Batch Title')
  *   ->setFinishCallback('batch_example_finished_callback')
  *   ->setInitMessage('The initialization message (optional)');
  * for ($i = 0; $i < 1000; $i++) {
@@ -359,15 +359,15 @@ public function setProgressive($is_progressive = TRUE) {
    * @return $this
    */
   public function setQueue($name, $class) {
-    if (is_null($name) && is_null($class)) {
+    if ($name === NULL && $class === NULL) {
       $this->queue = NULL;
+      return $this;
     }
-    else {
-      $this->queue = [
-        'name' => $name,
-        'class' => $class,
-      ];
-    }
+
+    $this->queue = [
+      'name' => $name,
+      'class' => $class,
+    ];
     return $this;
   }