public function getActiveChain($className, $classAlias = null)
    {
        if (!$classAlias) {
            $classAlias = $className;
        }
        $fullChain = $this->getFullChain($className, $classAlias);
        $activeChain = [];
        if (!empty($fullChain)) {
            $activeChain = $this->filterInactiveExtensions($fullChain);
        }

        return $activeChain;
    }