code: public function render($template, array $vars = array())
      {
          ob_start();
  
          try {
              $this->display($template, $vars);
          } catch (Exception $exception) {
              ob_end_clean();
  
              throw $exception;
          }
  
          return ob_get_clean();
      }
docs: Renders a template and returns the result.
  
  @param string  $template The name of the template.
  @param array   $vars     The template variables.
  
  @return string The template rendering.