def fetch(self):
        """
        Fetch a CallSummaryInstance

        :returns: Fetched CallSummaryInstance
        :rtype: twilio.rest.insights.v1.summary.CallSummaryInstance
        """
        params = values.of({})

        payload = self._version.fetch(
            'GET',
            self._uri,
            params=params,
        )

        return CallSummaryInstance(self._version, payload, call_sid=self._solution['call_sid'], )
Fetch a CallSummaryInstance

        :returns: Fetched CallSummaryInstance
        :rtype: twilio.rest.insights.v1.summary.CallSummaryInstance