Good morning,
I think, there’s a typo in the docs:
namespace Vendor\Site\Fusion;
use Neos\Flow\Annotations as Flow;
use Neos\Fusion\FusionObjects\AbstractFusionObject
At the end of use Neos\Fusion\FusionObjects\AbstractFusionObject a semicolon ist missing.
Maybe it’s also usefull to add a <?php at the first line for beginners?
Thank you and have a sunny day.