code: def _pad_batch_records(self, batch_records: List, phase: str):
      raise NotImplementedError
  
imports: from collections import namedtuple
  from typing import Callable, Generator, Generic, List
  import numpy
  from paddlehub.utils.log import logger
  from paddlehub.compat.task import tokenization
  from paddlehub.compat.task.batch import pad_batch_data
label_desc: Use image node_id 4 for calling the BaseNLPReader obj's underlying member method code with example usage: obj._pad_batch_records(batch_records, phase) without return types