function filterProperties(obj: Record<string, unknown>, keys: string[]): Record<string, unknown> {
  let newObj = {};
  for (let key of keys) {
    if (Object.hasOwn(obj, key)) {
      newObj[key] = obj[key];
    }
  }
  return newObj;
}

// No modificar: necesario para evaluar el resultado.
export { filterProperties };