Applied symplify rules to codebase.

src/Helpers/Trees/StructuralDBElementIterator.php

@@ -25,8 +25,10 @@ declare(strict_types=1);
 namespace App\Helpers\Trees;
 
 use App\Entity\Base\StructuralDBElement;
+use ArrayIterator;
+use RecursiveIterator;
 
-class StructuralDBElementIterator extends \ArrayIterator implements \RecursiveIterator
+final class StructuralDBElementIterator extends ArrayIterator implements RecursiveIterator
 {
     public function __construct($nodes)
     {

src/Helpers/Trees/TreeViewNode.php

@@ -24,11 +24,13 @@ declare(strict_types=1);
 
 namespace App\Helpers\Trees;
 
+use JsonSerializable;
+
 /**
  * This class represents a node for the bootstrap treeview node.
  * When you serialize an array of these objects to JSON, you can use the serialized data in data for the treeview.
  */
-class TreeViewNode implements \JsonSerializable
+final class TreeViewNode implements JsonSerializable
 {
     protected $text;
     protected $href;

src/Helpers/Trees/TreeViewNodeIterator.php

@@ -24,7 +24,10 @@ declare(strict_types=1);
 
 namespace App\Helpers\Trees;
 
-class TreeViewNodeIterator extends \ArrayIterator implements \RecursiveIterator
+use ArrayIterator;
+use RecursiveIterator;
+
+final class TreeViewNodeIterator extends ArrayIterator implements RecursiveIterator
 {
     /**
      * @param TreeViewNode[] $nodes

src/Helpers/Trees/TreeViewNodeState.php

@@ -24,18 +24,28 @@ declare(strict_types=1);
 
 namespace App\Helpers\Trees;
 
-class TreeViewNodeState implements \JsonSerializable
+use JsonSerializable;
+
+final class TreeViewNodeState implements JsonSerializable
 {
-    /** @var bool|null */
+    /**
+     * @var bool|null
+     */
     protected $checked = null;
 
-    /** @var bool|null */
+    /**
+     * @var bool|null
+     */
     protected $disabled = null;
 
-    /** @var bool|null */
+    /**
+     * @var bool|null
+     */
     protected $expanded = null;
 
-    /** @var bool|null */
+    /**
+     * @var bool|null
+     */
     protected $selected = null;
 
     /**