code: def trainer(self) -> Optional[TrainTask]:
      task: TrainTask = lib.trainers.HovernetNuclei(
          self.bundle_path, self.conf
      )
      return task
  
file_path: MONAILabel/sample-apps/pathology/lib/configs/hovernet_nuclei.py
imports: import logging
  import os
  from typing import Any, Dict, Optional, Union
  import lib.infers
  import lib.trainers
  from monai.bundle import download
  from monailabel.config import settings
  from monailabel.interfaces.config import TaskConfig
  from monailabel.interfaces.tasks.infer_v2 import InferTask
  from monailabel.interfaces.tasks.train import TrainTask
label_desc: Use image node_id 3 for calling the HovernetNuclei obj's underlying member method code with example usage: obj.trainer() and returns: task