protected function getSuperGlobalValue(/*# string */ $name)
    {
        $pos = strpos($name, $this->field_splitter);
        if (false !== $pos) {
            $pref = substr($name, 0, $pos);
            $suff = substr($name, $pos + 1);
            if (isset($GLOBALS[$pref][$suff])) {
                return $GLOBALS[$pref][$suff];
            }
        } else {
            $pref = $name;
            if (isset($GLOBALS[$pref])) {
                return $GLOBALS[$pref];
            }
        }
        return null;
    }