ModelEvent.php

<?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;
}