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Deprecation Guide for Controller#content alias

until: 2.17.0
id: controller-content-alias

For historical reasons, Controllers have a private property named content that aliases the model property.

With the introduction of this deprecation, if you wish to continue using content in the controller without a deprecation warning, you will have to add an explicit alias:

import Controller from '@ember/controller';
import { alias } from '@ember/object/computed';

export default Controller {
  content: alias('model')