public function getModuleExtensions($sModuleId)
    {
        if (!isset($this->_aModuleExtensions)) {
            $aModuleExtension = \OxidEsales\Eshop\Core\Registry::getConfig()->getModulesWithExtendedClass();
            $oModule = $this->getModule();
            $aExtension = [];
            foreach ($aModuleExtension as $sOxClass => $aFiles) {
                foreach ($aFiles as $sFilePath) {
                    $sId = $oModule->getIdByPath($sFilePath);
                    $aExtension[$sId][$sOxClass][] = $sFilePath;
                }
            }

            $this->_aModuleExtensions = $aExtension;
        }

        return $this->_aModuleExtensions[$sModuleId] ? $this->_aModuleExtensions[$sModuleId] : [];
    }