function create_leaf_loader(id) {
		// whether or not the route uses the server data is
		// encoded using the ones' complement, to save space
		const uses_server_data = id < 0;
		if (uses_server_data) id = ~id;
		return [uses_server_data, nodes[id]];
	}
@param {number} id
@returns {[boolean, import('types').CSRPageNodeLoader]}