'Update the RatePlanInstance
:param unicode unique_name: The unique_name
:param unicode friendly_name: The friendly_name
:returns: Updated RatePlanInstance
:rtype: twilio.rest.preview.wireless.rate_plan.RatePlanInstance'

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

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