CoffeeScript mixins

mixin.coffee

# Of course we can make something like this

class Module
  @include: (mixin) ->
    this.prototype[name] = method for name, method of mixin

Saveable = 
  save: -> alert "#{@name} saved!"

class User extends Module
  @include Saveable

  constructor: (@name) ->

u = new User("Navarro")
do u.save


# But what is the best way to make this work?

class User extends Module
  @include Saveable

  constructor: (@name) ->

  save: ->
    alert "Starting saving..."
    super
    alert "Done!"

u = new User("Navarro")
do u.save 
# super obviously will not work =[
# Too tired to think of how to change the prototype chain while keeping the syntax clean and simple...