How to use the ember-data-model-fragments.fragment function in ember-data-model-fragments

import DS from 'ember-data';
import MF from 'ember-data-model-fragments';

export default DS.Model.extend({
  title: DS.attr('string'),
  nickName: DS.attr('string'),
  name: MF.fragment('name'),
  names: MF.fragmentArray('name'),
  addresses: MF.fragmentArray('address'),
  titles: MF.array(),
  hobbies: MF.fragmentArray('hobby', { defaultValue: null }),
  houses: MF.fragmentArray('house'),
  children: MF.array(),
  strings: MF.array('string'),
  numbers: MF.array('number'),
  booleans: MF.array('boolean')
});

import DS from 'ember-data';
import MF from 'ember-data-model-fragments';

export default DS.Model.extend({
  name: DS.attr('string'),
  city: DS.attr('string'),
  star: MF.fragment('animal', { polymorphic: true, typeKey: '$type' }),
  animals: MF.fragmentArray('animal', { polymorphic: true, typeKey: '$type' }),
  manager: DS.belongsTo('person')
});

import MF from 'ember-data-model-fragments';
import DS from 'ember-data';

export default MF.Fragment.extend({
  amount: DS.attr('string'),
  recurring: DS.attr('boolean'),
  products: MF.fragmentArray('product'),
  product: MF.fragment('product')
});