Laravel 5 中自定义的validation放在什么位置比较好？

# app/wherever-you-want/CustomValidator.php

<?php

class CustomValidator extends Illuminate\Validation\Validator {

public function validateFoo($attribute, $value, $parameters)
{
return $value == 'foo';
}

}

<?php

class AppServiceProvider extends ServiceProvider{

public function boot()
{
// ...
Validator::resolver(function($translator, $data, $rules, $messages)
{
return new CustomValidator($translator, $data, $rules, $messages);
});
// ...
}

}