`log_record_list`.
    """
    return any(
        map(
            lambda log_record: substring in str(log_record.message),
            log_record_list,
        )
    )

  def _is_quantized_function(self, func: function_pb2.FunctionDef) -> bool:
    """Determine whether a FunctionDef is quantized.

    Args:
      func: A FunctionDef object.

    Returns:
      True iff `func` is quantized.