import { FirestoreRef } from '../types';
import { FirestoreReaderServiceFactory } from './helpers';
/**
 * Return factory of FirestoreSubscriber and FirestoreFinder
 * @param ref: firebase.firestore.DocumentReference | firebase.firestore.CollectionReference | firebase.firestore.Query
 * @returns FirestoreReaderServiceFactory
 */
export declare const from: (ref: FirestoreRef) => FirestoreReaderServiceFactory;