Symfony51Store example

public function getStore(): PersistingStoreInterface
    {
        return new RedisStore($this->getRedisConnection());
    }

    public function testBackwardCompatibility()
    {
        $resource = uniqid(__METHOD__, true);
        $key1 = new Key($resource);
        $key2 = new Key($resource);

        $oldStore = new Symfony51Store($this->getRedisConnection());
        $newStore = $this->getStore();

        $oldStore->save($key1);
        $this->assertTrue($oldStore->exists($key1));

        $this->expectException(LockConflictedException::class);
        $newStore->save($key2);
    }
}

class Symfony51Store
{