ADD NamespaceVisibility attribute

Author: DaveLiddament

src/NamespaceVisibility.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DaveLiddament\PhpLanguageExtensions;
+
+use Attribute;
+
+#[Attribute(Attribute::TARGET_CLASS | Attribute::TARGET_METHOD)]
+final class NamespaceVisibility
+{
+    public function __construct(
+        ?string $namespace = null,
+        bool $excludeSubNamespaces = false,
+    ) {
+    }
+}