src/third_party/devtools/node_modules/core-js/stable/instance/keys.js

require('../../modules/web.dom-collections.iterator');
var keys = require('../array/virtual/keys');
var classof = require('../../internals/classof');
var ArrayPrototype = Array.prototype;

var DOMIterables = {
  DOMTokenList: true,
  NodeList: true
};

module.exports = function (it) {
  var own = it.keys;
  return it === ArrayPrototype || (it instanceof Array && own === ArrayPrototype.keys)
    // eslint-disable-next-line no-prototype-builtins
    || DOMIterables.hasOwnProperty(classof(it)) ? keys : own;
};