luhn-generator/update/node_modules/yallist/iterator.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 Yallist = require('./yallist.js')

Yallist.prototype[Symbol.iterator] = function* () {
  for (let walker = this.head; walker; walker = walker.next) {
    yield walker.value
  }
}