code: def flat_state(self) -> dict[Key, Variable[Leaf]]:
      return traverse_util.flatten_dict(self._mapping, sep="/")
  
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 11 for calling the State obj's underlying member method code with example usage: obj.flat_state() and returns: traverse_util