'Fetch a RatePlanInstance
:returns: Fetched RatePlanInstance
:rtype: twilio.rest.wireless.v1.rate_plan.RatePlanInstance'

def fetch(self):

    params = values.of({})
    payload = self._version.fetch('GET', self._uri, params=params)
    return RatePlanInstance(self._version, payload, sid=self._solution['sid'])
