import { Writable } from 'extract-base-iterator';
type Callback = (error?: Error | null) => void;
type WriteFn = (this: FlushWriteStream, chunk: any, encoding: BufferEncoding, callback: Callback) => void;
type FlushFn = (callback: Callback) => void;
declare class FlushWriteStream extends Writable {
    destroyed: boolean;
    pathMade?: boolean;
    private _writeFn;
    private _flushFn;
    constructor(opts: object | undefined, writeFn: WriteFn, flushFn?: FlushFn);
    _write(chunk: any, enc: BufferEncoding, cb: Callback): void;
    end(chunk?: any, enc?: any, cb?: Callback): this;
    destroy(err?: Error | null): this;
}
export default function flushWriteStream(writeFn: WriteFn, flushFn?: FlushFn): FlushWriteStream;
export default function flushWriteStream(opts: object, writeFn: WriteFn, flushFn?: FlushFn): FlushWriteStream;
export {};