code: def add_axis(self, axis_name: AxisName, axis_index: AxisIndex):
      for hook in self.add_axis_hooks:
          hook(self, axis_name, axis_index)
  
imports: import dataclasses
  import functools
  import typing
  from abc import ABCMeta
  from functools import partial
  from typing import Any
  import jax
  import jax.tree_util
  from flax.experimental.nnx.nnx import reprlib
label_desc: Use image node_id 7 for calling the Variable obj's underlying member method code with example usage: obj.add_axis(axis_name, axis_index) without return types