docs: def _multihop_xml(self, **kwargs):
          """Build BGP multihop XML.
  
          Do not use this method directly.  You probably want ``multihop``.
  
          Args:
              rbridge_id (str): The rbridge ID of the device on which BGP will be
                  configured in a VCS fabric.
              neighbor (ipaddress.ip_interface): `ip_interface` object containing
                  peer IP address (IPv4 or IPv6).
              count (str): Number of hops to allow. (1-255)
  
          Returns:
              ``ElementTree``: XML for configuring BGP multihop.
  
          Raises:
              KeyError: if any arg is not specified.
  
          Examples:
              >>> import pynos.device
              >>> from ipaddress import ip_interface
              >>> conn = ('10.24.39.230', '22')
              >>> auth = ('admin', 'password')
              >>> with pynos.device.Device(conn=conn, auth=auth) as dev:
              ...     dev.bgp._multihop_xml(neighbor=ip_interface(unicode(
              ...     '10.10.10.10')), count='5', vrf='default', rbridge_id='1')
              ...     dev.bgp._multihop_xml(
              ...     ip='10.10.10.10') # doctest: +IGNORE_EXCEPTION_DETAIL
              Traceback (most recent call last):
              KeyError
          """
          ip_addr = kwargs.pop('neighbor')
          ip = str(ip_addr.ip)
          rbr_ns = 'urn:brocade.com:mgmt:brocade-rbridge'
          bgp_ns = 'urn:brocade.com:mgmt:brocade-bgp'
          config = ET.Element('config')
          ele = ET.SubElement(config, 'rbridge-id', xmlns=rbr_ns)
          ET.SubElement(ele, 'rbridge-id').text = kwargs.pop('rbridge_id')
          ele = ET.SubElement(ele, 'router')
          ele = ET.SubElement(ele, 'router-bgp', xmlns=bgp_ns)
          ele = ET.SubElement(ele, 'router-bgp-attributes')
          ele = ET.SubElement(ele, 'neighbor')
          if ip_addr.version == 4:
              ele = ET.SubElement(ele, 'neighbor-ips')
              ele = ET.SubElement(ele, 'neighbor-addr')
              ET.SubElement(ele, 'router-bgp-neighbor-address').text = ip
          else:
              ele = ET.SubElement(ele, 'neighbor-ipv6s')
              ele = ET.SubElement(ele, 'neighbor-ipv6-addr')
              ET.SubElement(ele, 'router-bgp-neighbor-ipv6-address').text = ip
          ele = ET.SubElement(ele, 'ebgp-multihop')
          ET.SubElement(ele, 'ebgp-multihop-count').text = kwargs.pop('count')
          return config