framework/log/Dispatcher.php
public function init()
    {
        parent::init();

        foreach ($this->targets as $name => $target) {
            if (!$target instanceof Target) {
                $this->targets[$name] = Yii::createObject($target);
            }
        }
    }
public function init()
    {
        parent::init();

        foreach ($this->targets as $name => $target) {
            if (!$target instanceof Target) {
                $this->targets[$name] = Yii::createObject($target);
            }
        }
    }
{@inheritdoc}