/**
 * expandedIds is the single source of truth for "open nodes", same model
 * as the Sidebar's expandedItems: a plain Set of ids, with expand/collapse
 * no-ops guarded so an already-open (or already-closed) node doesn't
 * trigger a re-render. Supports both controlled (`controlledIds` +
 * `onChange`, mirroring the Sidebar's activeLink-driven expansion) and
 * uncontrolled usage.
 */
export declare function useTreeExpansion(defaultExpandedIds?: string[], controlledIds?: string[], onChange?: (ids: string[]) => void): {
    expandedIds: Set<string>;
    setExpandedIds: (ids: string[]) => void;
    expand: (id: string) => void;
    collapse: (id: string) => void;
    toggle: (id: string) => void;
    expandAll: (ids: string[]) => void;
    collapseAll: () => void;
    isExpanded: (id: string) => boolean;
};