Laravel 5 - 特定用户角色的单独类

I am using the following package for role handling in Laravel 5: romanbican/roles

Now I can access my testers and customers with the following syntax:

$testers = User::role('tester')->get();
$customers = User::role('customer')->get();

It would be really helpful if I could access my testers with the following syntax:

$testers = Tester::get();

Is there any possibility I could achieve this behaviour? I tried to subclass the User model but it didn't work as expected.

I would really appreciate any help.

What about something like this?

class Tester {
    static function get() {
        return User::role('tester')->get();
    }
}