module A
  private
  def derp message
    puts [message, ' from A'].join
  end
end

module B
  private
  def derp
    puts 'from B'
    super("superclass")
    puts "subclass"
  end
end

class C
  include A
  include B
end

pp C.instance_method(:derp).super_method
# <UnboundMethod: A#derp>
C.send(:public, :derp)
pp C.instance_method(:derp).super_method
# <UnboundMethod: B#derp>