remove has

composer.json

@@ -4,7 +4,7 @@
     "license": "MIT",
     "autoload": {
         "psr-4": {
-            "Potter\\": "src/Potter/"
+            "Potter\\Event\\": "src/Potter/Event/"
         }
     },
     "authors": [
@@ -14,5 +14,13 @@
         }
     ],
     "minimum-stability": "stable",
-    "require": {}
+    "require": {
+        "league/event": ">=3.0.3",
+        "potter/container": ">=0.0.1",
+        "psr/event-dispatcher": ">=1.0.0",
+        "symfony/event-dispatcher": ">=8.1.2",
+        "symfony/event-dispatcher-contracts": ">=3.7.1",
+        "symfony/deprecation-contracts": ">=3.7.1",
+        "symfony/event-dispatcher": ">=8.1.2"
+    }
 }

src/Potter/Event/Behaviour.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Potter\Event;
+
+use \Potter\Container;
+
+trait Behaviour 
+{
+    private static function addDispatcher(Container $container): void
+    {
+        $container->addShared(Dispatcher::class);
+    }
+    
+    private static function addEventBehaviour(Container $container): void
+    {
+        self::addDispatcher($container);
+    }
+    
+    private static function getDispatcher(Container $container): Dispatcher
+    {
+        return $container->get(Dispatcher::class);
+    }
+}

src/Potter/Event/Dispatcher.php

@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Potter\Event;
+
+final class Dispatcher 
+    extends \League\Event\EventDispatcher
+{ }

src/Potter/Event/Event.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Potter\Event;
+
+final class Event 
+    extends \Symfony\Component\EventDispatcher\GenericEvent 
+    implements \League\Event\HasEventName
+{
+    public function __construct(mixed $subject = null, array $arguments = []) {
+        parent::__construct($subject, $arguments);
+    }
+    
+    public function eventName(): string
+    {
+        return is_string($subject = $this->getSubject()) ? 
+            $subject : get_class($this);
+    }
+}