code: def ip_v6_network_validator(v: Any) -> IPv6Network:
      
      if isinstance(v, IPv6Network):
          return v
  
      with change_exception(errors.IPv6NetworkError, ValueError):
          return IPv6Network(v)
docs: Assume IPv6Network initialised with a default ``strict`` argument
  
      See more:
      https://docs.python.org/library/ipaddress.html#ipaddress.IPv6Network