I've cloned tour of heroes tutorial product from angular team where demo data is storing in in-memory-data-service.ts. Since my preferred backend is django-rest-framework, I need to link them together. 
For example, my heroes are translating from localhost:8000/api/v1/heroes/.
  [
    {
        "name": "Greg",
        "id": 5,
    },
    {
        "name": "Krek",
        "id": 6,
    }
]
What should I do except removing in-memory-data-service.ts to replace heroes list with provided by django backend via json? It would be great if you'll tell me do I need model declaration 
export class Hero {
  id: number;
  name: string;
}
yet if rest-framework gives me full objects structure stored in JSON.
