Function empty

packages/decorators/src/utils.ts:80–80

(v: unknown)

  // validate only first parameter is used if its an option object
  const empty = (v: unknown) => v == null || (Utils.isPlainObject(v) && !Utils.hasObjectKeys(v));
  if (values.slice(1).some(v => !empty(v))) {
    throw new Error(
      'Mixing first decorator parameter as options object with other parameters is forbidden. ' +