```ruby
module StoreFederationRegistryData
  def create_or_update_by_fr_id(dataset, fr_id, **attrs)
    update_by_fr_id(dataset, fr_id, attrs) ||
      create_by_fr_id(dataset, fr_id, attrs) { |o| yield o if block_given? }
  end

  private

  def create_by_fr_id(dataset, fr_id, attrs)
    obj = dataset.model.new(attrs)
    yield obj if block_given?
    obj.save
    record_fr_id(obj, fr_id)
    obj
  end

  def update_by_fr_id(dataset, fr_id, attrs)
    obj = FederationRegistryObject.local_instance(fr_id, dataset)
    obj.try(:update, attrs)
    obj
  end

  def record_fr_id(object, fr_id)
    ds = FederationRegistryObject
         .where[internal_class_name: object.class.name, fr_id: fr_id]
    ds.delete if ds

    FederationRegistryObject.create(internal_class_name: object.class.name,
                                    internal_id: object.id,
                                    fr_id: fr_id)
  end
end
```

Change `.where[]` to `[]` for clarity
user
```ruby
module StoreFederationRegistryData
  def create_or_update_by_fr_id(dataset, fr_id, **attrs)
    update_by_fr_id(dataset, fr_id, attrs) ||
      create_by_fr_id(dataset, fr_id, attrs) { |o| yield o if block_given? }
  end

  private

  def create_by_fr_id(dataset, fr_id, attrs)
    obj = dataset.model.new(attrs)
    yield obj if block_given?
    obj.save
    record_fr_id(obj, fr_id)
    obj
  end

  def update_by_fr_id(dataset, fr_id, attrs)
    obj = FederationRegistryObject.local_instance(fr_id, dataset)
    obj.try(:update, attrs)
    obj
  end

  def record_fr_id(object, fr_id)
    ds = FederationRegistryObject[internal_class_name: object.class.name,
                                  fr_id: fr_id]
    ds.delete if ds

    FederationRegistryObject.create(internal_class_name: object.class.name,
                                    internal_id: object.id,
                                    fr_id: fr_id)
  end
end
```
assistant