def _proxy(self):
        """
        Generate an instance context for the instance, the context is capable of
        performing various actions.  All instance actions are proxied to the context

        :returns: SyncListItemContext for this SyncListItemInstance
        :rtype: twilio.rest.preview.sync.service.sync_list.sync_list_item.SyncListItemContext
        """
        if self._context is None:
            self._context = SyncListItemContext(
                self._version,
                service_sid=self._solution['service_sid'],
                list_sid=self._solution['list_sid'],
                index=self._solution['index'],
            )
        return self._context