code: def var_getattr(self, tx, name):
      if (
          torch._dynamo.config.force_unspec_int_unbacked_size_like_on_torchrec_kjt
          and self.source is not None
          and name in ("_length_per_key", "_offset_per_key")
      ):
          with TracingContext.patch(
              force_unspec_int_unbacked_size_like=True
          ):
              return super().var_getattr(tx, name)
      return super().var_getattr(tx, name)
  
imports: import collections
  import contextlib
  import functools
  import importlib
  import inspect
  import itertools
  import random
  import sys
  import threading
  import types
  from typing import Dict, List
  import torch._dynamo.config
  import torch.nn
  from torch._guards import TracingContext
  from ..None import variables
  from ..exc import unimplemented
  from ..guards import GuardBuilder, install_guard
  from ..source import AttrSource, GetItemSource, ODictGetItemSource, RandomValueSource
  from ..utils import all_hook_names, build_checkpoint_variable, check_constant_args, get_custom_getattr, has_torch_function, is_namedtuple_cls, is_utils_checkpoint, istype, namedtuple_fields, object_has_getattribute, proxy_args_kwargs, tensortype_to_dtype
  from .base import MutableLocal, VariableTracker
  from .ctx_manager import GenericContextWrappingVariable, NullContextVariable
  from .dicts import DefaultDictVariable
label_desc: Use image node_id 3 for calling the KeyedJaggedTensorVariable obj's underlying member method code with example usage: obj.var_getattr(tx, name) and returns: super, super