code: def default_onnx_opset(self) -> int:
      return 13
  
file_path: transformers/src/transformers/models/t5/configuration_t5.py
imports: from typing import Mapping
  from ...configuration_utils import PretrainedConfig
  from ...onnx import OnnxSeq2SeqConfigWithPast
  from ...utils import logging
label_desc: Use image node_id 2 for calling the T5OnnxConfig obj's underlying member method code with example usage: obj.default_onnx_opset() and returns: int