interface and definition

//ValidationListInterface.php
<?php
namespace MarketPlace\Attributes\Service;

interface ValidationListInterface
{
    public function validatorList();


}
?>
//ValidationList.php

<?php
namespace MarketPlace\Attributes\Service;

class ValidationList implements ValidationListInterface
{
    public function validatorList($validationList)
    {
        //yet to process the list
        return $validationList;
    }

}