Retrieves the desired resource.
Source
Future read(id, [Map params]) async {
int desiredId = int.parse(id.toString());
if (items.containsKey(desiredId)) {
T found = items[desiredId];
if (found != null) {
return _makeJson(desiredId, found);
} else throw new AngelHttpException.NotFound();
} else throw new AngelHttpException.NotFound();
}