@abc.abstractmethod<EOL><INDENT>def register_callback(self, receiver):<DEDENT>
pass<EOL>
Registers a callback to receive incoming data.

        :param receiver: a stream receievr
        :type receiver: ``osid.transport.StreamReceiver``
        :raise: ``NullArgument`` -- ``receiver`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request

        *compliance: mandatory -- This method must be implemented.*