public function __construct(Workflow $workflow, ManagerGroup $storage, $root)
{
parent::__construct($workflow, $storage);
if ($root instanceof PostRevision) {
$this->root = $root;
} elseif ($root instanceof RootPostLoader) {
$this->rootLoader = $root;
} else {
throw new InvalidInputException('Expected PostRevision or RootPostLoader, received: ' . is_object($root) ? get_class($root) : gettype($root), 'invalid-input');
}
}
