/**
  * Returns the root URL of framework installation directory.
  *
  * @param  bool  $absolute  Flag requiring to return the absolute URL instead of the relative one (default value).
  * @param  bool  $script    Flag requiring to return a URL containing index.php/ when module mod_rewrite (or
  *     similar mechanism) for generating human-readable URLs is not installed
  * @return  string
  */
 public function getRootUrl($absolute = false, $script = false)
 {
     return $this->config->getRootUrl($absolute, $script);
 }