export default function UndefinedToNull(obj, keys) {
  Object.keys(obj).forEach((key) => {
    if (keys && keys.indexOf(key) >= 0) {
        if (obj[key] === undefined) obj[key] = null;
    } else {
    if (obj[key] === undefined) obj[key] = null;
    }
  });
  return obj;
}