def update(self, configuration=values.unset, unique_name=values.unset):
data = values.of({'<STR_LIT>': serialize.object(configuration), '<STR_LIT>': unique_name, })<EOL>payload = self._version.update(<EOL>'<STR_LIT:POST>',<EOL>self._uri,<EOL>data=data,<EOL>)<EOL>return InstalledAddOnInstance(self._version, payload, sid=self._solution['<STR_LIT>'], )<EOL>
Update the InstalledAddOnInstance

:param dict configuration: The JSON object representing the configuration
:param unicode unique_name: The string that uniquely identifies this Add-on installation

:returns: Updated InstalledAddOnInstance
:rtype: twilio.rest.preview.marketplace.installed_add_on.InstalledAddOnInstance