declare const TextFileDBPersistence_base: new (opts: any) => any;
export declare class TextFileDBPersistence extends TextFileDBPersistence_base {
    constructor(opts: any);
    init(y: any): Promise<{}>;
    deinit(y: any): void;
    removePersistedData(room: string, destroyYjsInstances?: boolean): Promise<{}>;
    saveUpdate(y: any, update: any): void;
    persist(y: any): void;
    saveStruct(y: any, struct: any): void;
    retrieve(y: any): void;
}
export default function extendYTextFileDBPersistence(y: any): typeof TextFileDBPersistence;