code: def raw_order_book(self, pair, prec=None, **kwargs):
          
          prec = 'R0' if prec is None else prec
          self._subscribe('book', pair=pair, prec=prec, **kwargs)
docs: Subscribe to the passed pair's raw order book channel.
          :param pair: str, Pair to request data for.
          :param kwargs:
          :return: