luhn-generator/update/node_modules/core-js-pure/internals/freezing.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

var fails = require('../internals/fails');

module.exports = !fails(function () {
  return Object.isExtensible(Object.preventExtensions({}));
});