code: def _state_flatten(x: State):
      return (x._mapping,), None
  
imports: from __future__ import annotations
  import typing
  import jax
  import jax.tree_util
  from flax import traverse_util
  from flax.experimental.nnx.nnx import filterlib, reprlib
  from flax.experimental.nnx.nnx.variables import Variable
label_desc: Use image node_id 3 for calling a global function with example usage: _state_flatten(x) and returns: x,  None