public function renderCharacteristics(CharacteristicsInterface $characteristics, array $options = array())
    {
        $options = array_merge(array(
            'table_class' => 'table table-striped table-bordered table-condensed ekyna-characteristics',
            'highlight_inherited' => false,
            'display_group' => null,
        ), $options);

        return $this->template->render(array(
            'view' => $this->manager->createView($characteristics, $options['display_group']),
            'options' => $options,
        ));
    }