gistfile1.txt

:mixin Options
class UIButton extends UIControl
  click: ->
    @fireEvent 'click', [this]

gistfile2.js

var UIButton;
UIButton = function() {
  return UIControl.apply(this, arguments);
};
__extends(UIButton, UIControl);
UIButton.prototype.click = function() {
  return this.fireEvent('click', [this]);
};
UIButton = mixin(UIButton, Options);