Deprecation Guide for Ember.ApplicationInstance#container

When instance initializers were added, using appInstance.container.lookup was suggested in lieu of using the first argument to initializers. Unfortunately, the container system has always been private and the previous initializer deprecation led users down the wrong path.

During the 2.1 cycle a new feature (ember-registry-container-reform) was enabled to provide more public API's for accessing the container for looking up instances without exposing all of the private internals.

Please refactor from using appInstance.container.lookup to appInstance.lookup.

Before:

export function initialize(appInstance) {
  let store = appInstance.container.lookup('service:store');

  store.pushPayload(`<payload here>`);
}

export default {
  name: 'preload-store',
  initialize: initialize
}

After:

export function initialize(appInstance) {
  let store = appInstance.lookup('service:store');

  store.pushPayload(`<payload here>`);
}

export default {
  name: 'preload-store',
  initialize: initialize
}