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'use strict';
/** * Determines if `arg` is a flat object. * * @param {Object|Array|String|Function|RegExp|any} arg * @api private * @return {Boolean} */
module.exports = function isSimpleValidator(obj) {  const keys = Object.keys(obj);  let result = true;  for (let i = 0, len = keys.length; i < len; ++i) {    if (typeof obj[keys[i]] === 'object' && obj[keys[i]] !== null) {      result = false;      break;    }  }
  return result;};