lib/components/web/widgets/decorator/Decorator.php
public function generateStart()
    {
        $parts = [];
        foreach ($this->owner->widgetClasses as $class) {
            Html::addCssClass($this->owner->htmlOptions, $class);
        }
        $parts[] = Html::beginTag('div', $this->owner->htmlOptions);

        return implode("", $parts);
    }
public function generateStart()
    {
        $parts = [];
        foreach ($this->owner->widgetClasses as $class) {
            Html::addCssClass($this->owner->htmlOptions, $class);
        }
        $parts[] = Html::beginTag('div', $this->owner->htmlOptions);

        return implode("", $parts);
    }
[[@doctodo method_description:generateStart]].

@return [[@doctodo return_type:generateStart]] [[@doctodo return_description:generateStart]]