class_docstr: Train Task
code: def __call__(self, request, datastore: Datastore):
      pass
  
imports: from abc import ABCMeta, abstractmethod
  from monailabel.interfaces.datastore import Datastore
label_desc: Use image node_id 5 for calling the TrainTask obj's underlying member method code with example usage: obj.__call__(request, datastore) without return types