byID<T> static method
Implementation
static DataHandler<T>? byID<T>(String? id) {
if (id == null) return null;
var instance = DataRepository.byID(id) as DataHandler<T>?;
if (instance != null) return instance;
instance = DataSource.byID(id) as DataHandler<T>?;
if (instance != null) return instance;
instance = DataReceiver.byID(id) as DataHandler<T>?;
return instance;
}