code: def _peer_get_bfd(self, tx, rx, multiplier):
          
          tx = self._callback(tx, handler='get_config')
          rx = self._callback(rx, handler='get_config')
          multiplier = self._callback(multiplier, handler='get_config')
          tx = pynos.utilities.return_xml(str(tx))
          rx = pynos.utilities.return_xml(str(rx))
          multiplier = pynos.utilities.return_xml(str(multiplier))
          config = pynos.utilities.merge_xml(tx, rx)
          return pynos.utilities.merge_xml(config, multiplier)
docs: Get and merge the `bfd` config from global BGP.
  
          You should not use this method.
          You probably want `BGP.bfd`.
  
          Args:
              tx: XML document with the XML to get the transmit interval.
              rx: XML document with the XML to get the receive interval.
              multiplier: XML document with the XML to get the interval
                  multiplier.
  
          Returns:
              Merged XML document.
  
          Raises:
              None