text: import Ember from 'ember';
  export default Ember.Object.extend( {
    isOn: false,
    color: 'yellow',
    age: null,
    description: Ember.computed('isOn','color',function() {
      return 'The ' + this.get('color') + ' light is set to ' + this.get('isOn');
    }),
    fullDescription: Ember.computed('description','age',function() {
      return this.get('description') + ' and the age is ' + this.get('age');
    }),
    aliasDescription: Ember.computed.alias('fullDescription'),
    isOnChanged: Ember.observer('isOn',function() {
      console.log('isOn value changed');
    })
  
  });
  
  