Ember data: reuse one model for two guises

In the app user has two associations - billing address and company address which are identical

//address 
export default DS.Model.extend({
  email: DS.attr('string'),
  country: DS.attr('string'),
  zip: DS.attr('string'),
  user: DS.belongsTo('user')
  //...
});

//user
export default DS.Model.extend({
  name: DS.attr('string'),
  company: DS.belongsTo('address'),
  billing: DS.belongsTo('address')
  //...
});

How to pull this kind of trick?