include missing

tests/Classes/WithMapperObject.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Classes;
+
+use Carbon\CarbonPeriodImmutable;
+use Icefox\DTO\Attributes\FromMapper;
+use Icefox\DTO\DataObject;
+
+readonly class WithMapperObject
+{
+    use DataObject;
+
+    public function __construct(
+        #[FromMapper(CarbonPeriodMapper::class)]
+        public CarbonPeriodImmutable $period,
+    ) {}
+}