/**
* Renders the opening tag of the field container.
* @return string the rendering result.
*/
public function begin()
{
/*$inputID = Html::getInputId($this->model, $this->attribute);
$attribute = Html::getAttributeName($this->attribute);
$options = $this->options;
$class = isset($options['class']) ? [$options['class']] : [];
$class[] = "field-$inputID";
$options['class'] = implode(' ', $class);
$tag = ArrayHelper::remove($options, 'tag', 'div');*/
$tag = isset($this->options['tag']) ? $this->options['tag'] : 'div';
return Html::beginTag($tag, $this->options);
}