code: def read_examples_from_file(
      data_dir, mode: Union[Split, str]
  ) -> List[InputExample]:
      raise NotImplementedError
  
file_path: underthesea/examples/ner/utils_ner.py
imports: import logging
  import os
  from dataclasses import dataclass
  from enum import Enum
  from typing import List, Optional, Union
  from filelock import FileLock
  from transformers import PreTrainedTokenizer, is_tf_available, is_torch_available
label_desc: Use image node_id 1 for calling the TokenClassificationTask obj's underlying member method code with example usage: obj.read_examples_from_file(data_dir, mode) without return types