import { LayerCollection } from '../../engine/layer/index.js';
import { NameSpaceEngine } from '../../engine/utils/EngineManager/helper.js';

declare class HistoryHelper {
    history: LayerCollection[];
    pointer: number;
    constructor();
    beforeUpdate(engine: NameSpaceEngine): void;
    afterUpdate(layer: LayerCollection): void;
    redo(engine: NameSpaceEngine, cb?: (value: any) => void): void;
    undo(engine: NameSpaceEngine, cb?: (value: any) => void): void;
}

export { HistoryHelper };