Applied code style rules to src/

src/Helpers/Trees/TreeViewNodeState.php

@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
  *
@@ -74,9 +77,6 @@ class TreeViewNodeState implements \JsonSerializable
         $this->selected = $selected;
     }
 
-    /**
-     * {@inheritdoc}
-     */
     public function jsonSerialize()
     {
         $ret = [];