message: fix(forms): Broken link NG_VALIDATORS replace by an example
  PR Close
diff: @@ -24,6 +24,20 @@ function isEmptyInputValue(value: any): boolean {
  *
  * Provide this using `multi: true` to add validators.
  *
  + * ### Example
  + *
  + * ```typescript
  + * @Directive({
  + * selector: '[custom-validator]',
  + * providers: [{provide: NG_VALIDATORS, useExisting: CustomValidatorDirective, multi: true}]
  + * })
  + * class CustomValidatorDirective implements Validator {
  + * validate(control: AbstractControl): ValidationErrors | null {
  + * return {"custom": true};
  + * }
  + * }
  + * ```
  + *
  * @stable
  */
  export const NG_VALIDATORS = new InjectionToken<Array<Validator|Function>>('NgValidators');
  