protected static function analyzeSubVersion($i, array &$exp, &$increase)
    {
        $analyzed = false;

        if ($increase) {
            $exp[$i] = 0;
            $analyzed = true;
        }

        if (0 === $i && (int) $exp[$i] > 0) {
            $increase = true;
            $exp[$i] = (int) $exp[$i] + 1;
            $analyzed = true;
        }

        return $analyzed;
    }