code: public function button(Environment $environment, $link, $button, $size = 'md', $iconDisplay = 'true', $location = 'right', $label = null, $userStyle = null)
      {
          //Defines $icon and $style
          extract($this->toolbarService->defineButton($button));
  
          //Defines button
          return $environment->render('@c975LToolbar/buttonText.html.twig', array(
              'link' => $link,
              'style' => $style,
              'size' => $size,
              'button' => $button,
              'icon' => $icon,
              'label' => $label,
              'iconDisplay' => $iconDisplay,
              'location' => $location,
          ));
      }
docs: Returns the xhtml code for the button with text
  @return string