def __call__(self, iso_code):
return CountryContext(self._version, iso_code=iso_code, )<EOL>
Constructs a CountryContext

:param iso_code: The ISO country code

:returns: twilio.rest.voice.v1.dialing_permissions.country.CountryContext
:rtype: twilio.rest.voice.v1.dialing_permissions.country.CountryContext