code: def __init__(self, num_symbols, *args, **kwargs):
      self.num_symbols = num_symbols
  
file_path: audio/test/torchaudio_unittest/example/emformer_rnnt/utils.py
label_desc: Use image node_id 1 to create a new MockSentencePieceProcessor object  with example: obj = MockSentencePieceProcessor(num_symbols)