code: def __init__(self, name: str, size: Union[None, int] = None):
      self.name = name
      self._size = None
      self._vmap_level = None
      if size is not None:
          self.size = size
  
file_path: pytorch/functorch/dim/dim.py
imports: import dis
  import inspect
  from dataclasses import dataclass
  from typing import Union
  from .None import DimList
label_desc: Use image node_id 1 to create a new Dim object  with example: obj = Dim(name, size)