Actualización

vendor/doctrine/dbal/lib/Doctrine/DBAL/Event/SchemaEventArgs.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Doctrine\DBAL\Event;
+
+use Doctrine\Common\EventArgs;
+
+/**
+ * Base class for schema related events.
+ */
+class SchemaEventArgs extends EventArgs
+{
+    /** @var bool */
+    private $preventDefault = false;
+
+    /**
+     * @return SchemaEventArgs
+     */
+    public function preventDefault()
+    {
+        $this->preventDefault = true;
+
+        return $this;
+    }
+
+    /**
+     * @return bool
+     */
+    public function isDefaultPrevented()
+    {
+        return $this->preventDefault;
+    }
+}