Method reset

packages/forms/src/model/form_group.ts:817–817

* Resets the `FormRecord`, marks all descendants `pristine` and `untouched` and sets * the value of all descendants to null. * * See `FormGroup#reset` for additional information.

(
    value?: {[key: string]: ɵValue<TControl> | FormControlState<ɵValue<TControl>>},
    options?: {
      onlySelf?: boolean;
      emitEvent?: boolean;
    },
  )

   * See `FormGroup#reset` for additional information.
   */
  reset(
    value?: {[key: string]: ɵValue<TControl> | FormControlState<ɵValue<TControl>>},
    options?: {
      onlySelf?: boolean;