code: def default_onnx_opset(self) -> int:
      return 12
  
file_path: transformers/src/transformers/models/pvt/configuration_pvt.py
imports: from collections import OrderedDict
  from typing import Callable, List, Mapping
  from packaging import version
  from ...configuration_utils import PretrainedConfig
  from ...onnx import OnnxConfig
  from ...utils import logging
label_desc: Use image node_id 3 for calling the PvtOnnxConfig obj's underlying member method code with example usage: obj.default_onnx_opset() and returns: int