Description
{message content model}
is a property of the InterfaceMessageReference component. It does not map directly to the WSDL 2.0 infoset. So the set/getMessageContentModel methods currently defined on the InterfaceMessageReferenceElement interface should not be part of the Element API at all. This property should only be represented in the Component API, via InterfaceMessageReference.
These two methods should be removed from the Element API for M7 or at least deprecated for M7 and removed for M8.