code: def __init__(self, config):
      self.config = config
      self.collate_fn_test = SpeechCollator.from_config(config)
      self._text_featurizer = TextFeaturizer(
          unit_type=config.collator.unit_type,
          vocab_filepath=None,
          spm_model_prefix=config.collator.spm_model_prefix,
      )
  
file_path: PaddleHub/modules/audio/asr/u2_conformer_aishell/u2_conformer_tester.py
imports: import os
  import sys
  import paddle
  from deepspeech.frontend.featurizer.text_featurizer import TextFeaturizer
  from deepspeech.io.collator import SpeechCollator
  from deepspeech.models.u2 import U2Model
  from deepspeech.utils import mp_tools
  from deepspeech.utils.utility import UpdateConfig
label_desc: Use image node_id 1 to create a new U2ConformerTester object  with example: obj = U2ConformerTester(config)