GetSubscriber.
        [Preview API]
        :param str subscriber_id:
        :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_0.notification.models.NotificationSubscriber>`

def get_subscriber(self, subscriber_id):
        """GetSubscriber.
        [Preview API]
        :param str subscriber_id:
        :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_0.notification.models.NotificationSubscriber>`
        """
        route_values = {}
        if subscriber_id is not None:
            route_values['subscriberId'] = self._serialize.url('subscriber_id', subscriber_id, 'str')
        response = self._send(http_method='GET',
                              location_id='4d5caff1-25ba-430b-b808-7a1f352cc197',
                              version='5.0-preview.1',
                              route_values=route_values)
        return self._deserialize('NotificationSubscriber', response)