diff --git a/EventProvider.php b/EventProvider.php
index fd56e2e..61a21a3 100644
--- a/EventProvider.php
+++ b/EventProvider.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 namespace Kiri\Events;
 
 
+use Closure;
 use Psr\EventDispatcher\ListenerProviderInterface;
 use SplPriorityQueue;
 
@@ -13,54 +14,54 @@ use SplPriorityQueue;
 class EventProvider implements ListenerProviderInterface
 {
 
-	/** @var Struct[] */
-	private array $_listeners = [];
+    /** @var Struct[] */
+    private array $_listeners = [];
 
 
-	/**
-	 * @param object $event
-	 * @return SplPriorityQueue
-	 */
-	public function getListenersForEvent(object $event): SplPriorityQueue
-	{
-		$queue = new SplPriorityQueue();
-		$queue->setExtractFlags(SplPriorityQueue::EXTR_DATA);
-		// TODO: Implement getListenersForEvent() method.
-		foreach ($this->_listeners[get_class($event)] ?? [] as $listener) {
-			$queue->insert($listener->listener, $listener->priority);
-		}
-		return $queue;
-	}
+    /**
+     * @param object $event
+     * @return SplPriorityQueue
+     */
+    public function getListenersForEvent(object $event): SplPriorityQueue
+    {
+        $queue = new SplPriorityQueue();
+        $queue->setExtractFlags(SplPriorityQueue::EXTR_DATA);
+        // TODO: Implement getListenersForEvent() method.
+        foreach ($this->_listeners[get_class($event)] ?? [] as $listener) {
+            $queue->insert($listener->listener, $listener->priority);
+        }
+        return $queue;
+    }
 
 
-	/**
-	 * @param string $event
-	 * @param array|\Closure|string $handler
-	 * @param int $zOrder
-	 * @throws \Exception
-	 */
-	public function on(string $event, array|\Closure|string $handler, int $zOrder = 1)
-	{
-		if (is_string($handler) && !is_callable($handler, true)) {
-			throw new \Exception('Event handler must is execute function.');
-		}
-		$this->_listeners[$event][] = new Struct($event, $handler, $zOrder);
-	}
+    /**
+     * @param string $event
+     * @param array|Closure|string $handler
+     * @param int $zOrder
+     * @throws
+     */
+    public function on(string $event, array|Closure|string $handler, int $zOrder = 1): void
+    {
+        if (is_string($handler) && !is_callable($handler, true)) {
+            throw new \Exception('Event handler must is execute function.');
+        }
+        $this->_listeners[$event][] = new Struct($event, $handler, $zOrder);
+    }
 
 
-	/**
-	 * @param string $event
-	 * @param callable $handler
-	 * @return void
-	 */
-	public function off(string $event, callable $handler): void
-	{
-		$events = $this->_listeners[$event] ?? [];
+    /**
+     * @param string $event
+     * @param callable $handler
+     * @return void
+     */
+    public function off(string $event, callable $handler): void
+    {
+        $events = $this->_listeners[$event] ?? [];
 
-		$this->_listeners[$event] = array_filter($events, function ($value) use ($handler) {
-			return $value->listener !== $handler;
-		});
-	}
+        $this->_listeners[$event] = array_filter($events, function ($value) use ($handler) {
+            return $value->listener !== $handler;
+        });
+    }
 
 
 }