PhpSandbox\PHPSandbox::isDefinedSuperglobal PHP Method

    public function isDefinedSuperglobal($name, $key = null)
    {
        $name = $this->normalizeSuperglobal($name);
        return $key !== null ? isset($this->definitions['superglobals'][$name][$key]) : isset($this->definitions['superglobals'][$name]);
    }