class_docstr: A bounded functional stack implementation. Elements may be pytrees.
code: def flatten(self):
      leaves, treedef = jax.tree_util.tree_flatten(self._data)
      return ([self._size] + leaves), treedef
  
file_path: jax/jax/_src/lax/stack.py
imports: from __future__ import annotations
  from typing import Any
  import jax
  from jax import lax
  import jax.numpy
label_desc: Use image node_id 7 for calling the Stack obj's underlying member method code with example usage: obj.flatten() and returns: unknown,  treedef