Initial commit，修正

vendor/yiisoft/yii2/base/ModelEvent.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * @link https://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license https://www.yiiframework.com/license/
+ */
+
+namespace yii\base;
+
+/**
+ * ModelEvent represents the parameter needed by [[Model]] events.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class ModelEvent extends Event
+{
+    /**
+     * @var bool whether the model is in valid status. Defaults to true.
+     * A model is in valid status if it passes validations or certain checks.
+     */
+    public $isValid = true;
+}