/** One connection's admitted frames, including its submitted, unsettled write. */
export declare class StdioOutput {
    private readonly writable;
    private readonly maxBytes;
    private readonly onFailure;
    private readonly onIdle;
    private readonly queue;
    private active;
    private bytes;
    private stopped;
    private failure;
    private awaitingError;
    constructor(writable: NodeJS.WritableStream, maxBytes: number, onFailure: (error: unknown) => void, onIdle: () => void);
    get pending(): number;
    write(data: string): Promise<void>;
    abort(error: unknown): void;
    close(): void;
    private pump;
    private advance;
    private readonly onDrain;
    private readonly onError;
    private readonly onClose;
    private detach;
}