'Fetch a AvailableAddOnInstance
:returns: Fetched AvailableAddOnInstance
:rtype: twilio.rest.preview.marketplace.available_add_on.AvailableAddOnInstance'

def fetch(self):

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