code: def values_override(self) -> Optional[Mapping[str, Any]]:
      if hasattr(self._config, "use_cache"):
          return {"use_cache": self.use_past}
  
      return None
  
imports: import copy
  import dataclasses
  import warnings
  from abc import ABC, abstractmethod
  from collections import OrderedDict
  from typing import TYPE_CHECKING, Any, Callable, Dict, Iterable, List, Mapping, Optional, Tuple, Union
  import numpy
  from packaging import version
  from ..utils import TensorType, is_torch_available, is_vision_available, logging
  from .utils import ParameterFormat, compute_effective_axis_dimension, compute_serialized_parameters_size
label_desc: Use image node_id 4 for calling the OnnxConfigWithPast obj's underlying member method code with example usage: obj.values_override() and returns: None, dict