List<CoreExtension> extensions = new ArrayList<>();
        if (extensionsFile.isFile()) {
            extensions.addAll(readCoreExtensionsDescriptor(extensionsFile));
        }
        if (userHomeExtensionsFile.isFile()) {
            extensions.addAll(readCoreExtensionsDescriptor(userHomeExtensionsFile));
        }

        if (extensions.isEmpty()) {
            return Collections.emptyList();
        }