public function getDeletedExtensions()
    {
        $oModuleValidatorFactory = $this->getModuleValidatorFactory();
        $oModuleMetadataValidator = $oModuleValidatorFactory->getModuleMetadataValidator();
        $aModulesIds = $this->getModuleIds();
        $oModule = $this->getModule();
        $aDeletedExt = [];

        foreach ($aModulesIds as $sModuleId) {
            $oModule->setModuleData(['id' => $sModuleId]);
            if (!$oModuleMetadataValidator->validate($oModule)) {
                $aDeletedExt[$sModuleId]['files'] = [$sModuleId . '/metadata.php'];
            } else {
                $aInvalidExtensions = $this->_getInvalidExtensions($sModuleId);
                if ($aInvalidExtensions) {
                    $aDeletedExt[$sModuleId]['extensions'] = $aInvalidExtensions;
                }
            }
        }

        return $aDeletedExt;
    }