title: Angular 2 Multiple validators
body: <p>Is it possible to have multiple validators on a form field? I tried this, but it resulted in some strange errors (field was never valid, even if requirements were met)</p>
  
  <pre><code>this.username = new Control('', Validators.minLength(5), Validators.required);
  </code></pre>
  
  <p>How can I use multiple validators?</p>