import type { LayoutDirection, MindMapData } from '../types';
export interface MindMapHistorySnapshot {
    mapData: MindMapData[];
    direction: LayoutDirection;
    splitIndices: Record<string, number>;
    foldOverrides: Record<string, boolean>;
    selectedNodeId: string | null;
}
export declare function cloneMindMapData(data: MindMapData[]): MindMapData[];
export declare function cloneHistorySnapshot(snapshot: MindMapHistorySnapshot): MindMapHistorySnapshot;
export declare function areHistorySnapshotsEqual(a: MindMapHistorySnapshot, b: MindMapHistorySnapshot): boolean;
export declare function pushHistorySnapshot(stack: MindMapHistorySnapshot[], snapshot: MindMapHistorySnapshot): MindMapHistorySnapshot[];