getDataItemController method
Implementation
NsgDataItemController<T> getDataItemController(String widgetId) {
if (_dataItemControllers.containsKey(widgetId)) {
return _dataItemControllers[widgetId]!;
}
var instance = getNewInstance();
instance.widgetId = widgetId;
_dataItemControllers[widgetId] = instance as NsgDataItemController<T>;
return _dataItemControllers[widgetId]!;
}