[Serializer] Section about configuring Circular Reference Handler

reference/configuration/framework.rst

@@ -1952,7 +1952,7 @@ name_converter
 
 The name converter to use.
 The :class:`Symfony\\Component\\Serializer\\NameConverter\\CamelCaseToSnakeCaseNameConverter`
-name converter can enabled by using the ``serializer.name_converter.camel_case_to_snake_case``
+name converter can be enabled by using the ``serializer.name_converter.camel_case_to_snake_case``
 value.
 
 .. seealso::

serializer.rst

@@ -276,6 +276,22 @@ value:
             ],
         ]);
 
+Enabling Circular Reference Handler
+-----------------------------------
+
+The use of the :ref:`circular reference handler <component-serializer-handling-circular-references>` service can be defined
+in the configuration using the :ref:`circular_reference_handler <reference-serializer-circular_reference_handler>` option.
+
+A circular reference handler service has to implement the magic ``__invoke($object)`` method, like in example::
+
+    class MyCircularReferenceHandler
+    {
+        public function __invoke($object)
+        {
+            return $object->getName();
+        }
+    }
+
 Going Further with the Serializer
 ---------------------------------