Detect type DS 2

adapters.application.js

import DS from 'ember-data';

export default DS.RESTAdapter.extend({
  host: 'https://jsonplaceholder.typicode.com',
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

models.todo.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
  title: attr('string')
});

routes.application.js

import Ember from 'ember';
import DS from 'ember-data';

export default Ember.Route.extend({
  model() {
    return this.get('store').findAll('todo').then((todos) => {
      
			for (var key of Object.keys(DS)) {
        if (DS.hasOwnProperty(key) && (typeof DS[key] !== 'string') && (typeof DS[key] !== 'object') && (todos instanceof DS[key])) {
          console.log('Тип найден: ', key);
        }
      }
      
      return todos;
      
    })
  }
});

serializers.todo.js

import DS from 'ember-data';

export default DS.RESTSerializer.extend({

	normalizeFindAllResponse (store, primaryModelClass, payload, id, requestType) {
    payload = { todos: payload };

    return this._super(store, primaryModelClass, payload, id, requestType);
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

<ul>
{{#each model as |todo|}}
	<li>{{todo.title}}</li>
{{/each}}
</ul>
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}