maybe.rb

class Maybe
  class Some < Maybe
  end
  
  class None
  end
end

class Result
  class Success < Result
    def to_maybe
      Maybe::Some.new(value!)
    end
  end
  
  class Failure < Result
    def to_maybe
      None.new
    end
  end
end

result.rb

class Result
  def to_maybe
    raise "Load maybe!"
  end
  
  class Success < Result
  end
  
  class Failure < Result
  end
end