/// <reference types="node" />
import { AvroMessage } from '@ovotech/avro-stream';
import { Writable } from 'stream';
export declare class FileWritable extends Writable {
    private filename;
    private requests;
    constructor(filename: string);
    _write(message: AvroMessage, encoding: string, callback: (error?: Error | null) => void): Promise<void>;
}