symfony · javiereguiluz · Feb 23, 2020 · Feb 22, 2020
diff --git a/workflow.rst b/workflow.rst
@@ -423,8 +423,7 @@ missing a title::
            $title = $post->title;

            if (empty($title)) {
-                // Block the transition "to_review" if the post has no title
-                $event->setBlocked(true);
+                $event->setBlocked(true, 'This blog post cannot be marked as reviewed because it has no title.');
            }
        }

@@ -436,6 +435,10 @@ missing a title::
        }
    }

+.. versionadded:: 5.1
+
+    The optional second argument of ``setBlocked()`` was introduced in Symfony 5.1.
+
 Event Methods
 ~~~~~~~~~~~~~