code: def retrieve(self, request, *args, **kwargs):
          
          return super(CustomerViewSet, self).retrieve(request, *args, **kwargs)
docs: Optional `field` query parameter (can be list) allows to limit what fields are returned.
          For example, given request /api/customers/<uuid>/?field=uuid&field=name you get response like this:
  
          .. code-block:: javascript
  
              {
                  "uuid": "90bcfe38b0124c9bbdadd617b5d739f5",
                  "name": "Ministry of Bells"
              }