import * as expressSession from 'express-session';
import { Datastore } from '@google-cloud/datastore';
export interface DataStoreOptions {
    dataset?: Datastore;
    datastore?: Datastore;
    kind?: string;
    expirationMs?: number;
}
export declare class DatastoreStore extends expressSession.Store {
    ds: Datastore;
    kind: string;
    expirationMs: number;
    constructor(options?: DataStoreOptions);
    get: (sid: string, callback: (err: Error | null, session?: expressSession.SessionData | null) => void) => void;
    set: (sid: string, sess: expressSession.SessionData, callback?: (err: Error | null) => void) => void;
    destroy: (sid: string, callback?: (err: Error | null) => void) => void;
}