GetGeoRegion.
        [Preview API] Lookup up country/region based on provided IPv4, null if using the remote IPv4 address.
        :param str ip:
        :rtype: :class:`<GeoRegion> <azure.devops.v5_1.profile-regions.models.GeoRegion>`

def get_geo_region(self, ip):
        """GetGeoRegion.
        [Preview API] Lookup up country/region based on provided IPv4, null if using the remote IPv4 address.
        :param str ip:
        :rtype: :class:`<GeoRegion> <azure.devops.v5_1.profile-regions.models.GeoRegion>`
        """
        query_parameters = {}
        if ip is not None:
            query_parameters['ip'] = self._serialize.query('ip', ip, 'str')
        response = self._send(http_method='GET',
                              location_id='35b3ff1d-ab4c-4d1c-98bb-f6ea21d86bd9',
                              version='5.1-preview.1',
                              query_parameters=query_parameters)
        return self._deserialize('GeoRegion', response)