How to use the @ngneat/transloco.flatten function in @ngneat/transloco

it('should translate simple string multiple keys from lang', () => {
    const lang = flatten({
      withKeys: 'with keys',
      from: 'from',
      lang: 'lang',
      nes: { ted: 'supporting nested values!' }
    });
    const parsed = parser.transpile('Hello {{ withKeys }} {{ from }} {{ lang }} {{nes.ted}}', {}, lang);
    expect(parsed).toEqual('Hello with keys from lang supporting nested values!');
  });