function getModels(): Collection
    {
        $models = collect(File::allFiles(app_path()))
            ->map(function ($item) {
                $path = $item->getRelativePathName();
                $class = sprintf('\%s%s',
                    Container::getInstance()->getNamespace(),
                    strtr(substr($path, 0, strrpos($path, '.')), '/', '\\'));
                return $class;
            })
            ->filter(function ($class) {
                $valid = false;
                if (class_exists($class)) {
                    $reflection = new \ReflectionClass($class);
                    $valid = $reflection->isSubclassOf(Model::class) &&
                        !$reflection->isAbstract();
                }
                return $valid;
            });
        return $models->values();
    }