@abc.abstractmethod<EOL><INDENT>def get_family_notification_session(self, family_receiver, proxy):<DEDENT>
return<EOL>
Gets the ``OsidSession`` associated with the family notification service.

        :param family_receiver: the receiver
        :type family_receiver: ``osid.relationship.FamilyReceiver``
        :param proxy: a proxy
        :type proxy: ``osid.proxy.Proxy``
        :return: a ``FamilyNotificationSession``
        :rtype: ``osid.relationship.FamilyNotificationSession``
        :raise: ``NullArgument`` -- ``family_receiver`` or ``proxy`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_family_notification()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_family_notification()`` is ``true``.*