'The wire protocol version the server must support.
Some read preferences impose version requirements on all servers (e.g.
maxStalenessSeconds requires MongoDB 3.4 / maxWireVersion 5).
All servers\' maxWireVersion must be at least this read preference\'s
`min_wire_version`, or the driver raises
:exc:`~pymongo.errors.ConfigurationError`.'

@property
def min_wire_version(self):

    return (0 if (self.__max_staleness == (-1)) else 5)
