def update(self, quality_score, issue=values.unset):
return self._proxy.update(quality_score, issue=issue, )<EOL>
Update the FeedbackInstance

:param unicode quality_score: The call quality expressed as an integer from 1 to 5
:param FeedbackInstance.Issues issue: Issues experienced during the call

:returns: Updated FeedbackInstance
:rtype: twilio.rest.api.v2010.account.call.feedback.FeedbackInstance