code: def dim(self) -> int:
      return len(self.tensor_size)
  
imports: import functools
  import itertools
  from dataclasses import dataclass
  from typing import Any, Callable, Dict, List, Optional, Tuple, Union
  import torch
  import torch.utils._pytree
label_desc: Use image node_id 4 for calling the FakeTensorMeta obj's underlying member method code with example usage: obj.dim() and returns: len