code: def update(self, fallback_actions=values.unset):
          
          return self._proxy.update(fallback_actions=fallback_actions, )
docs: Update the AssistantFallbackActionsInstance
  
          :param dict fallback_actions: The fallback_actions
  
          :returns: Updated AssistantFallbackActionsInstance
          :rtype: twilio.rest.preview.understand.assistant.assistant_fallback_actions.AssistantFallbackActionsInstance