docs: def parse_address(address):
  		""" Parse string and return :class:`.WIPV4Address` object if an IP address is specified,
  		:class:`.WFQDN` if domain name is specified and None if the string is empty.
  
  		:param address: string to parse
  		:return: WIPV4Address or WFQDN or None
  		"""
  
  		if len(address) == 0:
  			return None
  
  		try:
  			return WIPV4Address(address)
  		except ValueError:
  			pass
  
  		try:
  			return WFQDN(address)
  		except ValueError:
  			pass
  
  		raise ValueError('Unable to parse address string. It must be an IP address or FQDN')