1 files changed, 37 insertions, 0 deletions

diff --git a/vendor/doctrine/event-manager/src/EventArgs.php b/vendor/doctrine/event-manager/src/EventArgs.php
new file mode 100644
index 0000000..eea3d8a
--- /dev/null
+++ b/vendor/doctrine/event-manager/src/EventArgs.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Common;
+
+/**
+ * EventArgs is the base class for classes containing event data.
+ *
+ * This class contains no event data. It is used by events that do not pass state
+ * information to an event handler when an event is raised. The single empty EventArgs
+ * instance can be obtained through {@link getEmptyInstance}.
+ */
+class EventArgs
+{
+    /**
+     * Single instance of EventArgs.
+     */
+    private static EventArgs|null $emptyEventArgsInstance = null;
+
+    /**
+     * Gets the single, empty and immutable EventArgs instance.
+     *
+     * This instance will be used when events are dispatched without any parameter,
+     * like this: EventManager::dispatchEvent('eventname');
+     *
+     * The benefit from this is that only one empty instance is instantiated and shared
+     * (otherwise there would be instances for every dispatched in the abovementioned form).
+     *
+     * @link https://msdn.microsoft.com/en-us/library/system.eventargs.aspx
+     * @see EventManager::dispatchEvent
+     */
+    public static function getEmptyInstance(): EventArgs
+    {
+        return self::$emptyEventArgsInstance ??= new EventArgs();
+    }
+}