* coding style fixes

src/Form/Element/ObjectMultiCheckbox.php

@@ -1,21 +1,20 @@
 <?php
 
+declare(strict_types=1);
+
 namespace DoctrineMezzioModule\Form\Element;
 
 use Laminas\Form\Element\MultiCheckbox;
 use Laminas\Stdlib\ArrayUtils;
 use Traversable;
 
+use function array_map;
+use function is_array;
+
 class ObjectMultiCheckbox extends MultiCheckbox
 {
-    /**
-     * @var Proxy
-     */
-    protected $proxy;
+    protected Proxy $proxy;
 
-    /**
-     * @return Proxy
-     */
     public function getProxy(): Proxy
     {
         if (null === $this->proxy) {
@@ -52,10 +51,10 @@ class ObjectMultiCheckbox extends MultiCheckbox
     {
         if ($value instanceof Traversable) {
             $value = ArrayUtils::iteratorToArray($value);
-        } elseif ($value == null) {
+        } elseif ($value === null) {
             return parent::setValue([]);
         } elseif (! is_array($value)) {
-            $value = (array)$value;
+            $value = (array) $value;
         }
 
         return parent::setValue(array_map([$this->getProxy(), 'getValue'], $value));