title: how to get form validation from angular 1.5 component
body: <p>I know how to set form validation from angular 1.5 </p>
  
  <p>for example:
  <code>$scope.voiceForm.$setValidity</code></p>
  
  <p>but how can i <code>get</code> the <code>form-validaiton</code> status from the component code?</p>
  
  <p>couldn't find in the <a href="https://docs.angularjs.org/api/ng/type/ngModel.NgModelController" rel="nofollow noreferrer">documentation</a></p>