def get_path_prefix
      if defined?(Rails) && Rails.application.config.relative_url_root
        Regexp.new("^" + Regexp.escape(Rails.application.config.relative_url_root))
      end
    end
def get_path_prefix
      if defined?(Rails) && Rails.application.config.relative_url_root
        Regexp.new("^" + Regexp.escape(Rails.application.config.relative_url_root))
      end
    end
def get_path_prefix if defined? ( Rails ) && Rails . application . config . relative_url_root Regexp . new ( "^" + Regexp . escape ( Rails . application . config . relative_url_root ) ) end end
Configures the @path_prefix in order to handle apps
 mounted under RAILS_RELATIVE_URL_ROOT.
Configures the