def get_asset_notification_session(self, asset_receiver=None, proxy=None):
<EOL>return self._provider_manager.get_asset_notification_session(asset_receiver,<EOL>proxy)<EOL>
Gets the notification session for notifications pertaining to asset changes.

        arg:    asset_receiver (osid.repository.AssetReceiver): the
                notification callback
        arg:    proxy (osid.proxy.Proxy): a proxy
        return: (osid.repository.AssetNotificationSession) - an
                ``AssetNotificationSession``
        raise:  NullArgument - ``asset_receiver`` or ``proxy`` is
                ``null``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_asset_notification()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_asset_notification()`` is ``true``.*