class_docstr: trec data class test for cls task.
code: def download(self) -> bool:
      train_url = "https://raw.githubusercontent.com/thtrieu/qclass_dl/master/data/train"
      test_url = "https://raw.githubusercontent.com/thtrieu/qclass_dl/master/data/test"
      try:
          wget.download(train_url, self.download_dir)
          wget.download(test_url, self.download_dir)
      except Exception as e:
          logging.warning(repr(e))
          return False
      return True
  
file_path: delta/delta/data/datasets/trec.py
imports: import os
  import traceback
  import wget
  from absl import logging
  from delta.data.datasets.base_dataset import BaseDataSet
  from delta.utils.register import registers
label_desc: Use image node_id 2 for calling the TREC obj's underlying member method code with example usage: obj.download() and returns: True, False