misskey/packages/backend/src/misc/dev-null.ts

import { Writable, WritableOptions } from "node:stream";

export class DevNull extends Writable implements NodeJS.WritableStream {
    constructor(opts?: WritableOptions) {
        super(opts);
    }

    _write (chunk: any, encoding: BufferEncoding, cb: (err?: Error | null) => void) {
        setImmediate(cb);
    }
}