Laravel 5 中自定义的validation放在什么位置比较好？

Laravel 5 中自定义的validation放在什么位置比较好？
最近在论坛发现了个比较满意的方案。

# app/wherever-you-want/CustomValidator.php<?phpclass CustomValidator extends Illuminate\Validation\Validator {    public function validateFoo($attribute, $value, $parameters)    {        return $value == 'foo';    }}

<?phpclass AppServiceProvider extends ServiceProvider{  public function boot()  {    // ...    Validator::resolver(function($translator, $data, $rules, $messages)    {      return new CustomValidator($translator, $data, $rules, $messages);    });    // ...  }}

References

l5-where-to-add-custom-validation-function @pmall