@abc.abstractmethod<EOL><INDENT>def get_bin_notification_session(self, bin_receiver, proxy):<DEDENT>
return<EOL>
Gets the notification session for subscribing to changes to a bin.

        :param bin_receiver: notification callback
        :type bin_receiver: ``osid.resource.BinReceiver``
        :param proxy: a proxy
        :type proxy: ``osid.proxy.Proxy``
        :return: a ``BinNotificationSession``
        :rtype: ``osid.resource.BinNotificationSession``
        :raise: ``NullArgument`` -- ``bin_receiver`` or ``proxy`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_bin_notification()`` is ``false``

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