code: def update(self, ip_address=values.unset, friendly_name=values.unset,
                 cidr_prefix_length=values.unset):
          
          return self._proxy.update(
              ip_address=ip_address,
              friendly_name=friendly_name,
              cidr_prefix_length=cidr_prefix_length,
          )
docs: Update the IpAddressInstance
  
          :param unicode ip_address: An IP address in dotted decimal notation from which you want to accept traffic. Any SIP requests from this IP address will be allowed by Twilio. IPv4 only supported today.
          :param unicode friendly_name: A human readable descriptive text for this resource, up to 64 characters long.
          :param unicode cidr_prefix_length: An integer representing the length of the CIDR prefix to use with this IP address when accepting traffic. By default the entire IP address is used.
  
          :returns: Updated IpAddressInstance
          :rtype: twilio.rest.api.v2010.account.sip.ip_access_control_list.ip_address.IpAddressInstance