import { Node, NodeId } from '../../../../types/core';
/**
 * Get sorted child node ids for a given parent id.
 *
 * Returned list is sorted by each node's `order`, then title.
 */
export declare function getSortedChildNodeIds(nodes: Record<NodeId, Node>, parentId: NodeId): readonly NodeId[];
/**
 * Root nodes are those without a parent id.
 * Returned list is sorted by each node's `order`, then title.
 */
export declare function getSortedRootNodeIds(nodes: Record<NodeId, Node>): readonly NodeId[];