singleton class methods.rb

class Message
  class << self
    def some_meth; "Hello from Message"; end
  end
end


class Version < Message
  class << self
    def some_meth; "Hello from Version"; end
  end
end

class AltMessage < Message
end


Message.some_meth # => "Hello from Message"
Version.some_meth # => "Hello from Version"
AltMessage.some_meth # => "Hello from Message'