Pass options to relations

assoc_options.js

var Employee = Backbone.AssociatedModel.extend({
    parse:function (obj) {
           if (obj.sex === "M") {
                obj.prefix = "Mr.";
           }
           return obj;
     }
});
var Company = Backbone.AssociatedModel.extend({
    relations:[
        {
            type:Backbone.Many,
            relatedModel:Employee,
            key:'employees',
            options:{
                parse:true    //  set relation options
            }
        }
    ]
)};
var c = new Company();
c.set("employees", [
    {
        name: "John",
        sex: "M"
    }
]);
console.log(c.get("employees[0].prefix")); // Mr.