@property
    def ipv4_mapped(self):
        if (self._ip >> 32) != 0xFFFF:
            return None
        return IPv4Address(self._ip & 0xFFFFFFFF)
Select window sizes according to the acceptable variances.
dataset/ETHPy150Open Exa-Networks/exabgp/lib/exabgp/dep/ipaddress.py/IPv6Address.ipv4_mapped--crossover with--dataset/ETHPy150Open beloglazov/openstack-neat/neat/locals/overload/mhod/multisize_estimation.py/select_window