/**
* Return the selected entries.
*
* @param ValueTreeBuilder $tree
* @param $key
* @return null|string
*/
public function selected(ValueTreeBuilder $tree, $key)
{
/* @var Collection $config */
$config = $this->dispatch(new GetConfiguration($key));
$tree->setConfig($config)->setModel($config->get('related'))->setSelected($this->request->get('uploaded'));
$this->dispatch(new HydrateValueTree($tree));
return $tree->build()->response()->getTreeContent();
}
