title: Angular2: Find out if FormControl has required validator?
body: <p>does someone know a way to find out for an Angular2 FormControl if the required validor is registered for the control.</p>
  
  <pre><code>this.form = builder.group({name: ['', Validators.required]};
  </code></pre>
  
  <p>Can I then query the <code>this.form.controls['name']</code> control if it is a required field? I know I can check if it is valid, but that's not what I want.</p>
  
  <p>Kind regards,
  Marc</p>