def update(self, is_reserved=values.unset):
data = values.of({'<STR_LIT>': is_reserved, })<EOL>payload = self._version.update(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return ShortCodeInstance(<EOL>self._version,<EOL>payload,<EOL>service_sid=self._solution['<STR_LIT>'],<EOL>sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
Update the ShortCodeInstance

:param bool is_reserved: Whether the short code should be reserved for manual assignment to participants only

:returns: Updated ShortCodeInstance
:rtype: twilio.rest.proxy.v1.service.short_code.ShortCodeInstance