Restore function from overriden polyfill (ES5)

index.js

function restoreNativeFunctionFromPolyfillOverride(callback) {
  var d = document;
  var dE = d.documentElement;
  var e = d.createElement("iframe");
  e.style.display = "none";
  dE.appendChild(e);
  callback(window, e.contentWindow);
  dE.removeChild(e);
}

restoreNativeFunctionFromPolyfillOverride(function(w, c) {
  w.Array.from = c.Array.from;
});