js/libs/ember-1.5.1.js
function() {
    Ember.assert("You must call advanceReadiness on an instance of Ember.Application", this instanceof Ember.Application);
    this._readinessDeferrals--;

    if (this._readinessDeferrals === 0) {
      Ember.run.once(this, this.didBecomeReady);
    }
  }
function() {
    Ember.assert("You must call advanceReadiness on an instance of Ember.Application", this instanceof Ember.Application);
    this._readinessDeferrals--;

    if (this._readinessDeferrals === 0) {
      Ember.run.once(this, this.didBecomeReady);
    }
  }
Call `advanceReadiness` after any asynchronous setup logic has completed.
Each call to `deferReadiness` must be matched by a call to `advanceReadiness`
or the application will never become ready and routing will not begin.

@method advanceReadiness
@see {Ember.Application#deferReadiness}