code: def variables(self) -> StateVariablesMapping:
      return StateVariablesMapping(self._mapping)
  
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 the State obj's underlying member method code with example usage: obj.variables() and returns: StateVariablesMapping