super_classbox.rb

class X
  def foo
    puts "X"
  end
end

module A
  def foo
    print "A -> "
    super
  end
end

module B
  def foo
    print "B -> "
    super
  end
end

module C
  overlay_module X, A
  overlay_module X, B
  X.new.foo # => B -> A -> X
end