docs: def rslv(self, interface: str, name: str=None) -> Tuple[str, int, Optional[str]]:
  		"""Return the IP address, port and optionally host IP for one of this Nodes interfaces."""
  		if name is None:
  			name = self.name
  		key = '{}-{}'.format(name, interface)
  		host = None
  		if 'host' in self.interfaces[key]:
  			host = self.interfaces[key]['host']
  		return self.interfaces[key]['ip'], self.interfaces[key]['port'], host