luhn-generator/update/node_modules/core-js/modules/_entry-virtual.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 core = require('./_core');
module.exports = function (CONSTRUCTOR) {
  var C = core[CONSTRUCTOR];
  return (C.virtual || C.prototype);
};