Missing addData in XmlSerializerVisitor makes it impossible to add data in serializer.post_serialize event

[benglass]

I might be missing something but since XmlSerializerVisitor doesnt extend GenericSerializerVisitor you cannot add data in the post_serialize event. When its JSON which extends GenericSerializer I can add data but not when its xml.

[Sander-Toonen]

+1 Is this on purpose?

[goetas]

can be done in the via

$visitor->getCurrentNode()->appendChild($yourNode);