def __init__(self, do_lower_case=True, vocab=tuple()):
    """Constructs a BasicTokenizer.

    Args:
      do_lower_case: Whether to lower case the input.
      vocab: A container of tokens to not mutate during tokenization.
    """
    self.do_lower_case = do_lower_case
    self.vocab = vocab
Constructs a BasicTokenizer.

    Args:
      do_lower_case: Whether to lower case the input.
      vocab: A container of tokens to not mutate during tokenization.
    
test/external/mlperf_bert/preprocessing/tokenization.py