public function getDataAttributes($extra = [])
    {
        $output = '';

        foreach (array_merge($this->html_attributes, $extra) as $attribute => $value) {
            if (! is_null($value)) {
                $output .= $attribute.'="'.$value.'"';
            } elseif (! $value && isset($this->args[Cuztom::uglify($attribute)])) {
                $output .= $attribute.'="'.$this->args[Cuztom::uglify($attribute)].'"';
            }
        }

        return apply_filters('cuztom_field_html_attributes', $output, $this, $extra);
    }