protected function getVariables($showAll)
    {
        $scopeVars = $this->context->getAll();
        \uksort($scopeVars, function ($a, $b) {
            $aIndex = \array_search($a, self::$specialNames);
            $bIndex = \array_search($b, self::$specialNames);

            if ($aIndex !== false) {
                if ($bIndex !== false) {
                    return $aIndex - $bIndex;
                }

                return 1;
            }

            if ($bIndex !== false) {
                return -1;
            }

            return \strnatcasecmp($a, $b);
        });

        $ret = [];
        foreach ($scopeVars as $name => $val) {
            if (!$showAll && \in_array($name, self::$specialNames)) {
                continue;
            }

            $ret[$name] = $val;
        }

        return $ret;
    }