import { Writable } from 'node:stream';
import { Buffer } from 'node:buffer';
export declare class StreamWritePromise extends Writable {
    private _buffer;
    private _promise;
    private _resolve;
    private _reject;
    constructor();
    _write(chunk: Buffer, _: BufferEncoding, callback: (error?: (Error | null)) => void): void;
    _final(callback: (error?: (Error | null)) => void): void;
    _destroy(error: Error | null, callback: (error?: (Error | null)) => void): void;
    toPromise(): Promise<Buffer>;
}