src/transformers/onnx/config.py/OnnxConfig/default_batch_size
class OnnxConfig:    def default_batch_size(self) -> int:
        """
        The default batch size to use if no other indication

        Returns:
            Integer > 0
        """
        # Using 2 avoid ONNX making assumption about single sample batch
        return OnnxConfig.DEFAULT_FIXED_BATCH