refactored code

Signed-off-by: Maurice Preuß (envoyr) <hello@envoyr.com>

src/Id/Resources/Countries.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Anikeen\Id\Resources;
+
+use Anikeen\Id\Concerns\HasBillable;
+
+class Countries extends BaseCollection
+{
+    use HasBillable;
+
+    /**
+     * {@inheritDoc}
+     */
+    public function find(string $id): ?BaseResource
+    {
+        return null;
+    }
+}