'Update the IpAddressInstance
:param unicode ip_address: The ip_address
:param unicode friendly_name: The friendly_name
:returns: Updated IpAddressInstance
:rtype: twilio.rest.api.v2010.account.sip.ip_access_control_list.ip_address.IpAddressInstance'

def update(self, ip_address=values.unset, friendly_name=values.unset):

    return self._proxy.update(ip_address=ip_address, friendly_name=friendly_name)
