module SuperCoolExampleForRenatoSilva

  class SomeRandomClass
    def self.moo
      puts "Hello, I am a cow."
    end
  end

  class SomeOtherClass
    def self.meow
      puts "Hello, I am a cat. I am standing next to a cow."
      SomeRandomClass.moo
      SuperCoolExampleForRenatoSilva::SomeRandomClass.moo
    end
  end

end

SuperCoolExampleForRenatoSilva::SomeRandomClass.moo
SuperCoolExampleForRenatoSilva::SomeOtherClass.meow

SomeRandomClass.moo # error!