docs: def get_stream(self, channel):
          """Return the stream of the given channel
  
          :param channel: the channel that is broadcasting.
                          Either name or models.Channel instance
          :type channel: :class:`str` | :class:`models.Channel`
          :returns: the stream or None, if the channel is offline
          :rtype: :class:`models.Stream` | None
          :raises: None
          """
          if isinstance(channel, models.Channel):
              channel = channel.name
  
          r = self.kraken_request('GET', 'streams/' + channel)
          return models.Stream.wrap_get_stream(r)