code: def main(cmd=None):
      """Hubert pretraining.
  
      Example:
          % python hubert_train.py asr --print_config --optim adadelta \
                  > conf/hubert_asr.yaml
          % python hubert_train.py --config conf/train_asr.yaml
      """
      HubertTask.main(cmd=cmd)
  
label_desc: Use image node_id 2 for calling a global function with example usage: main(cmd) without return types