luhn-generator/update/node_modules/@babel/runtime-corejs3/helpers/esm/isNativeFunction.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

import _indexOfInstanceProperty from "@babel/runtime-corejs3/core-js/instance/index-of";
export default function _isNativeFunction(fn) {
  var _context;

  return _indexOfInstanceProperty(_context = Function.toString.call(fn)).call(_context, "[native code]") !== -1;
}