export declare class FanoutWriteStream implements WritableStreamDefaultWriter<Uint8Array> {
    readonly _writers: WritableStreamDefaultWriter<Uint8Array>[];
    readonly ready: Promise<never>;
    readonly closed: Promise<never>;
    readonly desiredSize: number | null;
    constructor(writers: WritableStreamDefaultWriter<Uint8Array>[]);
    abort(reason?: unknown): Promise<void>;
    close(): Promise<void>;
    releaseLock(): void;
    write(chunk?: Uint8Array): Promise<void>;
}
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