code: private static function get($style, $setting, $defaultValue = '')
      {
          if (isset(self::$styles[$style])) {
              $style = self::$styles[$style];
              if (isset($style[$setting])) {
                  return $style[$setting];
              }
          }
          return $defaultValue;
      }
docs: Get style setting.
  
  @param string $style
  @param string $setting
  @param string $defaultValue Default ''.
  @return string