How to use the @ionic/utils-subprocess.fork function in @ionic/utils-subprocess

export async function sendMessage({ config, ctx }: SendMessageDeps, msg: IPCMessage) {
  const dir = path.dirname(config.p);
  await mkdirp(dir);
  const fd = await open(path.resolve(dir, 'helper.log'), 'a');
  const p = fork(ctx.binPath, ['_', '--no-interactive'], { stdio: ['ignore', fd, fd, 'ipc'] });

  p.send(msg);
  p.disconnect();
  p.unref();
}

start(): void {
    try {
      fs.accessSync(this.modulePath, fs.constants.R_OK);
    } catch (e) {
      debug('Error during access check: %O', e);
      throw new IPCError(`Module not accessible: ${this.modulePath}`);
    }

    const p = fork(this.modulePath, this.args, { stdio: ['ignore', 'ignore', 'ignore', 'ipc'] });
    debug('RPC subprocess forked %o', [this.modulePath, ...this.args]);

    this.rpc.start(p);
  }