code: def preferred_batch_format(cls) -> BatchFormat:
      return BatchFormat.NUMPY
  
file_path: ray/python/ray/train/_internal/dl_predictor.py
imports: import abc
  from typing import Dict, Optional, TypeVar, Union
  import numpy
  import pandas
  from ray.air.util.data_batch_conversion import BatchFormat, _convert_batch_type_to_pandas, _convert_pandas_to_batch_type
  from ray.train.predictor import Predictor
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 4 for calling the DLPredictor obj's underlying member method code with example usage: obj.preferred_batch_format(cls) and returns: BatchFormat