CoffeeScript: Getter/Setter in Object Initializers

ECMAScript allows us to define getters or setters as following:

[text/javascript]

var object = {
  property: 7,
  get getable() { return this.property + 1; },
  set setable(x) { this.property = x / 2; }
};

I can work around if I'm using a class:

[text/coffeescript]

"use strict"

Function::trigger = (prop, getter, setter) ->
      Object.defineProperty @::,
              get: getter
              set: setter               

class Class
      property: ''

      @trigger 'getable', ->
               'x'

      member: 0

But what if I want to define trigger on the object directly - without using defineProperty / -ies. I want to do something like (it's not working that way):

[text/x-pseudo-coffeescript]

object =
  property: 'xhr'
  get getable: 'x'

It's working in JavaScript without any problems and I don't want my scripts to regress when I'm using CoffeeScript. Isn't there a way to do this as comfortable as in JavaScript/ECMAScript? Thanks.