Add return types and docblock

tests/Support/Settings.php

@@ -7,28 +7,31 @@ use App\Models\Setting;
 class Settings
 {
     private Setting $setting;
-    
+
     private function __construct()
     {
         $this->setting = Setting::factory()->create();
     }
 
-    public static function initialize()
+    public static function initialize(): Settings
     {
         return new self();
     }
 
-    public function enableMultipleFullCompanySupport()
+    public function enableMultipleFullCompanySupport(): void
     {
         $this->update(['full_multiple_companies_support' => 1]);
     }
 
-    public function set(array $attributes)
+    /**
+     * @param array $attributes Attributes to modify in the application's settings.
+     */
+    public function set(array $attributes): void
     {
         $this->update($attributes);
     }
 
-    private function update(array $attributes)
+    private function update(array $attributes): void
     {
         Setting::unguarded(fn() => $this->setting->update($attributes));
         Setting::$_cache = null;