def fetch(self):
params = values.of({})<EOL>payload = self._version.fetch(<EOL>'<STR_LIT:GET>',<EOL>self._uri,<EOL>params=params,<EOL>)<EOL>return CallSummaryInstance(self._version, payload, call_sid=self._solution['<STR_LIT>'], )<EOL>
Fetch a CallSummaryInstance

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