def restore(self):
        """
        Restore the snapshot
        """

        yield from self._project.delete_on_computes()
        # We don't send close notif to clients because the close / open dance is purely internal
        yield from self._project.close(ignore_notification=True)
        self._project.controller.notification.emit("snapshot.restored", self.__json__())
        try:
            if os.path.exists(os.path.join(self._project.path, "project-files")):
                shutil.rmtree(os.path.join(self._project.path, "project-files"))
            with open(self._path, "rb") as f:
                project = yield from import_project(self._project.controller, self._project.id, f, location=self._project.path)
        except (OSError, PermissionError) as e:
            raise aiohttp.web.HTTPConflict(text=str(e))
        yield from project.open()
        return project
Restore the snapshot