@abc.abstractmethod<EOL><INDENT>def get_inbound_message_session(self, message_receiver):<DEDENT>
return<EOL>
Gets a service for inbound message transport.

        :param message_receiver: a message receiver
        :type message_receiver: ``osid.transport.MessageReceiver``
        :return: an ``InboundMessageSession``
        :rtype: ``osid.transport.InboundMessageSession``
        :raise: ``NullArgument`` -- ``message_receiver`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_inbound_message() is false``

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