Model validation message

I have a separate config singleton that I require first (this is the first item in my requires array) in app.js. I'd like to use a validation message inside of my models that will be pulled from this config file something like this:

Code:

    validations: [
            {
                type: 'presence',
                field: 'title',
                message: Myapp.myconfig.getMesssages().mymessage
            }
        ],

I was wondering whether I'm guaranteed to have Myapp.myconfig.getMesssages().mymessage ready at this time? Help is much appreciated! Thanks!