How to use the @foal/core.HttpResponseOK function in @foal/core

async home(ctx: Context) {
      // Normally in an HTML template
      const response = new HttpResponseOK();
      setCsrfCookie(response, await getCsrfToken());
      return response;
    }
  }

home() {
      return new HttpResponseOK('Home page');
    }
  }

foo() {
      return new HttpResponseOK();
    }

foo() {
        return new HttpResponseOK();
      }

home() {
      return new HttpResponseOK('You are on the home page!');
    }
  }

async patchById(ctx: Context) {
    const testFooBar = await getRepository(TestFooBar).findOne(ctx.request.params.testFooBarId);

    if (!testFooBar) {
      return new HttpResponseNotFound();
    }

    Object.assign(testFooBar, ctx.request.body);

    await getRepository(TestFooBar).save(testFooBar);

    return new HttpResponseOK(testFooBar);
  }

async putById(ctx: Context) {
    const testFooBar = await getRepository(TestFooBar).findOne(ctx.request.params.testFooBarId);

    if (!testFooBar) {
      return new HttpResponseNotFound();
    }

    Object.assign(testFooBar, ctx.request.body);

    await getRepository(TestFooBar).save(testFooBar);

    return new HttpResponseOK(testFooBar);
  }

getOpenApiDefinition(ctx: Context) {
    if (isUrlOption(this.options)) {
      return new HttpResponseNotFound();
    }

    if (!Array.isArray(this.options)) {
      const document = createOpenApiDocument(this.options.controllerClass, this.controllers);
      return new HttpResponseOK(document);
    }

    const name = ctx.request.query.name;
    if (typeof name !== 'string') {
      return new HttpResponseBadRequest('Missing URL parameter "name".');
    }

    const option = this.options.find(option => option.name === name);
    if (!option || isUrlOption(option)) {
      return new HttpResponseNotFound();
    }

    return new HttpResponseOK(createOpenApiDocument(option.controllerClass, this.controllers));
  }

async putById(ctx: Context) {
    const product = await getRepository(Product).findOne(ctx.request.params.id);

    if (!product) {
      return new HttpResponseNotFound();
    }

    Object.assign(product, ctx.request.body);

    await getRepository(Product).save(product);

    return new HttpResponseOK(product);
  }

token() {
          return new HttpResponseOK(tokens);
        }
      }