/// <reference types="node" />
import * as fs from 'fs';
import { LineReader } from './line-reader';
export declare class ImportService {
    private firestore;
    private lineReader;
    constructor(firestore: FirebaseFirestore.Firestore, lineReader?: LineReader);
    import(readStream: fs.ReadStream, batchSize?: number, transformer?: (data: any, path: string) => Promise<any>): Promise<void>;
}