How to access model type of hasMany array

I need to know the model type of a hasMany array.

export default DS.Model.extend({
  addresses: DS.hasMany('address', { async: true })
})

With a regular model you can do model.constructor.modelName to find the type of the model. So if I am passed the addresses array, how do I find out that the type of the array elements are address?

Update: Actually I solved my problem in a better way with the createRecord() function on the array which automatically adds a record of the correct type to the array. It would still be interesting to know if the above is possible though.