getSubscriptionId example

#[Package('checkout')] class RecurringDataStructTest extends TestCase
{
    public function testGetters(): void
    {
        $time = new \DateTime();
        $struct = new RecurringDataStruct('foo', $time);

        static::assertSame('foo', $struct->getSubscriptionId());
        static::assertSame($time, $struct->getNextSchedule());
    }
}