Core/InternalModule.php
public function isMetadataSupported()
    {
        $sMetadataVersion = $this->getMetaDataVersion();

        $sLatestVersion = '1.0';

        if (method_exists('oxModuleList', 'getModuleVersions') || method_exists('oxModule', 'getModuleEvents')) {
            $sLatestVersion = '1.1';
        }

        if (method_exists(ModuleList::class, 'getModuleConfigParametersByKey')) {
            $sLatestVersion = '2.0';
        }

        if (method_exists(ModuleList::class, 'getSmartyPluginDirectories')) {
            $sLatestVersion = '2.1';
        }


        return version_compare($sLatestVersion, $sMetadataVersion) >= 0;
    }
public function isMetadataSupported()
    {
        $sMetadataVersion = $this->getMetaDataVersion();

        $sLatestVersion = '1.0';

        if (method_exists('oxModuleList', 'getModuleVersions') || method_exists('oxModule', 'getModuleEvents')) {
            $sLatestVersion = '1.1';
        }

        if (method_exists(ModuleList::class, 'getModuleConfigParametersByKey')) {
            $sLatestVersion = '2.0';
        }

        if (method_exists(ModuleList::class, 'getSmartyPluginDirectories')) {
            $sLatestVersion = '2.1';
        }


        return version_compare($sLatestVersion, $sMetadataVersion) >= 0;
    }
Check supported metadata version

@return bool