public function render()
    {
        if ($this->html instanceof \Closure) {
            $this->html = $this->html->call($this->form->model(), $this->form);
        }

        if ($this->plain) {
            return $this->html;
        }

        $viewClass = $this->getViewElementClasses();

        return <<<EOT
<div class="form-group">
    <label  class="{$viewClass['label']} control-label">{$this->label}</label>
    <div class="{$viewClass['field']}">
        {$this->html}
    </div>
</div>
EOT;
    }