I was asked how I deal with validation / create and update validation rulesets. Well here is one method I have used. Don't be afraid to build on top of what the framework has already given you. In my projects I use a base class for almost anything. You never know when you want your classes to inherit some common functionality. My BaseValidator actually has some pretty useful methods and properties in it.
<?php
namespace FooProject\Internal\Validators;
use FooProject\Internal\Sanitizers\BaseSanitizer;