Specify protype_name option's first appearance

greg0ire · weaverryan · commit bdf09d4bf2f0 · 2012-10-17T17:00:31.000-05:00
diff --git a/reference/forms/types/collection.rst b/reference/forms/types/collection.rst
@@ -317,6 +317,9 @@ as :ref:`cookbook-form-collections-new-prototype`.
 prototype_name
 ~~~~~~~~~~~~~~
 
+.. versionadded:: 2.1
+    The ``prototype_name`` option was added in Symfony 2.1
+
 **type**: ``String`` **default**: ``__name__``
 
 If you have several collections in your form, or worse, nested collections
