declare const IndexedDBPersistence_base: new (opts: any) => any;
export declare class IndexedDBPersistence extends IndexedDBPersistence_base {
    constructor(opts: any);
    init(y: any): Promise<{}>;
    deinit(y: any): void;
    set(y: any, key: any, value: any): Promise<{}>;
    get(y: any, key: any): Promise<{}>;
    /**
     * Remove all persisted data that belongs to a room.
     * Automatically destroys all Yjs all Yjs instances that persist to
     * the room. If `destroyYjsInstances = false` the persistence functionality
     * will be removed from the Yjs instances.
     */
    removePersistedData(room: any, destroyYjsInstances?: boolean): Promise<{}>;
    saveUpdate(y: any, update: any): void;
    saveStruct(y: any, struct: any): void;
    retrieve(y: any): Promise<void>;
    persist(y: any): Promise<void>;
}
export default function extendYIndexedDBPersistence(y: any): typeof IndexedDBPersistence;