Ember.run.{debounce,throttle,later} have variable arguments

Straight from the docs (http://emberjs.com/api/classes/Ember.run.html),
see the method debounce is defined thusly:

debounce (target, method, args*, wait, immediate): void

Even though the last two arguments are guaranteed, the variable
arguments in the middle means we can only ever type everything after
method as "...any".