FluidTYPO3\Flux\Package\FluxPackageFactory::getPackage PHP Method

    public static function getPackage($qualifiedExtensionName)
    {
        if (empty($qualifiedExtensionName)) {
            throw new PackageNotFoundException('Package name cannot be empty');
        }
        $extensionKey = ExtensionNamingUtility::getExtensionKey($qualifiedExtensionName);
        if (!ExtensionManagementUtility::isLoaded($extensionKey)) {
            throw new PackageNotFoundException(sprintf('Package name %s (extension key %s) is not loaded', $qualifiedExtensionName, $extensionKey));
        }
        if (!array_key_exists($extensionKey, static::$packages)) {
            $manifestPath = ExtensionManagementUtility::extPath($extensionKey, 'flux.json');
            static::$packages[$extensionKey] = FluxPackage::create($manifestPath)->upcast();
        }
        return static::$packages[$extensionKey];
    }