Add type annotation to events tests to make closure compiler happy. Since cc doesn't understand semantics of _.extend, tell it explicitly that all these `obj` variables have all the properties of Backbone.Events.
Add type annotation to events tests to make closure compiler happy.
Since cc doesn't understand semantics of _.extend, tell it explicitly
that all these `obj` variables have all the properties of
Backbone.Events.

lukeasrodgers/backbone-js-externs,skotchio/backbone-js-externs,skotchio/backbone-js-externs,lukeasrodgers/backbone-js-externs