当promise resolve在Nest中未定义时，如何返回404 HTTP状态码？

import { HttpException, HttpStatus } from '@nestjs/common';

export class NotFoundException extends HttpException {
  constructor() {
    super('Not Found', HttpStatus.NOT_FOUND);
  }
}

import { NotFoundException } from './exceptions/not-found.exception';

async someFunction(): Promise<any> {
  const result = await someAsyncOperation();
  
  if (!result) {
    throw new NotFoundException();
  }
  
  return result;
}