message: docs(forms): add array example to get method
  PR Close
diff: @@ -830,6 +830,17 @@ export abstract class AbstractControl {
  * -OR-
  *
  * * `this.form.get(['person', 'name']);`
  + *
  + * ### Retrieve a control in a FormArray
  + *
  + * When accessing an element inside a FormArray, you can use an element index.
  + * For example, to get a `price` control from the first element in an `items` array you can use:
  + *
  + * * `this.form.get('items.0.price');`
  + *
  + * -OR-
  + *
  + * * `this.form.get(['items', 0, 'price']);`
  */
  get(path: Array<string|number>|string): AbstractControl|null {
  return _find(this, path, '.');
  