class_docstr: data class for mock seqlabel task.
class_docstr_tok: ["data","class","for","mock","seqlabel","task","."]
code: def after_download(self) -> bool:
      try:
          train_file_path = os.path.join(self.data_dir, self.train_file)
          dev_file_path = os.path.join(self.data_dir, self.dev_file)
          test_file_path = os.path.join(self.data_dir, self.test_file)
  
          text_vocab_file = os.path.join(self.data_dir, self.text_vocab)
          label_vocab_file = os.path.join(
              self.data_dir, self.label_vocab
          )
  
          mock_data(
              self.samples,
              train_file_path,
              dev_file_path,
              test_file_path,
              text_vocab_file,
              self.text_vocab_list,
              label_vocab_file,
              self.label_vocab_list,
          )
  
      except Exception as e:
          logging.warning(traceback.format_exc())
          return False
      return True
  
file_path: delta/delta/data/datasets/mock_text_seq_label_data.py
imports: import os
  import traceback
  from absl import logging
  from delta.data.datasets.base_dataset import BaseDataSet
  from delta.data.datasets.utils import mock_data
  from delta.utils.register import registers
label_desc: Use image node_id 3 for calling the MockTextSeqLabelData obj's underlying member method code with example usage: obj.after_download() and returns: True, False