#!/usr/bin/ruby

module BaseModule
  def cry
    p "wa wa wa waaa"
  end
end

module ExtendedModule
  include BaseModule

  #override the cry method from BaseModule
  def cry
    super
    p "aa waa aa waa"
  end
end

class MyClass
  include ExtendedModule
end

MyClass.new.cry #=> wa wa wa waaa aa waa aa waa