protected function getGroup($classname)
    {
        $category = FieldCategory::query()->firstOrCreate([
            'name' => strtolower(last(explode('\\', $classname)))
        ]);
        return FieldGroup::query()->firstOrCreate([
                    'category_id' => $category->id,
                    'name'        => $category->name,
        ]);
    }