frontend\components\Theme::init PHP Метод

    public function init()
    {
        parent::init();
        if (!isset($this->theme)) {
            $this->theme = 'default';
        }
        $this->basePath = '@app/themes/' . $this->theme;
        $this->baseUrl = '@web/themes/' . $this->theme;
        $this->pathMap = ['@frontend/views' => '@app/themes/' . $this->theme];
    }