How do you get a Loading template in ember-cli PODS?

I've seen this url Ember-cli Pods & Loading Templates but adding a /app/bugs/loading.hbs or /app/bugs/detail/loading.hbs or even /app/bugs/detail/loading/template.hbs doesn't work.

1. What is the specific name/path of the template?
2. Its my understanding loading/error/index routes are generated automatically when you add an additional functions in this.route('bugs', function(){})

I'm missing something probably easy - any thoughts?