perf(Docs): Prefer a traditional `for` loop to `for-in`.
perf(Docs): Prefer a traditional `for` loop to `for-in`.

PiperOrigin-RevId: 168244133

matanlurey/angular,matanlurey/angular,chalin/angular2,kevmoo/angular,kevmoo/angular,kevmoo/angular,chalin/angular2,angulardart/angular,chalin/angular2,matanlurey/angular,angulardart/angular,angulardart/angular