silverstripe-framework/tests/php/Core/ObjectTest/MySubObject.php

<?php

namespace SilverStripe\Core\Tests\ObjectTest;

class MySubObject extends MyObject
{
    public $title = 'my subobject';
    private static $mystaticProperty = "MySubObject";
    static $mystaticSubProperty = "MySubObject";
    static $mystaticArray = ['two'];
}