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

:param dict fallback_actions: The fallback_actions

:returns: Updated AssistantFallbackActionsInstance
:rtype: twilio.rest.preview.understand.assistant.assistant_fallback_actions.AssistantFallbackActionsInstance