import { AddDoc } from '../types';
/**
 * Add a new document to this collection with the specified data, assigning
 * it a document ID automatically.
 *
 * @param data An Object containing the data for the new document.
 * @throws Error If the provided input is not a valid Firestore document.
 * @return A Promise resolved with a `DocumentReference` pointing to the
 * newly created document after it has been written to the backend.
 */
export declare const addDoc: AddDoc;