Method render

/**
 * Render action button by item value.
 *
 * @param   integer|null  $value        Current value of this item.
 * @param   integer|null  $row          The row number of this item.
 * @param   array         $options      The options to override group options.
 *
 * @return  string  Rendered HTML.
 *
 * @since  4.0.0
 */
public function render(?int $value = null, ?int $row = null, array $options = []) : string
{
    $default = $this->unknownState;
    $options['tip_title'] = $options['tip_title'] ?? $options['title'] ?? $default['title'];
    return parent::render($value, $row, $options);
}