import type { TreeNode } from './types';
/**
 * All node ids that already have at least one known child - the eager
 * "expand all" target set. A node whose children haven't been resolved yet
 * (lazy mode, before its first load) is skipped: expanding it needs a
 * fetch, not a state flip, so it isn't safe to include here.
 */
export declare function collectExpandableIds<T>(nodes: TreeNode<T>[]): string[];
/**
 * DFS chain of ancestor ids leading to `targetId` within an already-known
 * tree - pass the result to `defaultExpandedIds`/`expandedIds` to reveal a
 * specific node (mirrors the Sidebar's `findExpandableParentChain`). Only
 * searches subtrees already present via `children`, so in lazy mode this
 * can only find a target inside branches already loaded.
 */
export declare function findAncestorIds<T>(nodes: TreeNode<T>[], targetId: string): string[];