code: def _variable_unflatten(
      metadata: tp.Mapping[str, tp.Any],
      children: tp.Tuple[A],
      *,
      cls: type[Variable[A]],
  ) -> Variable[A]:
      variable = object.__new__(cls)
      variable.value = children[0]
      vars(variable).update(metadata)
      return variable
  
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 2 for calling a global function with example usage: _variable_unflatten(metadata, children) and returns: variable