protected function getAppNamespace()
    {
        $composer = json_decode(file_get_contents(base_path().'/composer.json'), true);

        foreach ((array) data_get($composer, 'autoload.psr-4') as $namespace => $path) {
            foreach ((array) $path as $pathChoice) {
                if (realpath(app_path()) == realpath(base_path().'/'.$pathChoice)) {
                    return $namespace;
                }
            }
        }

        throw new \RuntimeException('Unable to detect application namespace.');
    }