code: def __setitem__(self, key: Key | int, value: Leaf | State) -> None:
      if isinstance(key, int):
          key = str(key)
      if isinstance(value, State):
          self._mapping[key] = value._mapping
      else:
          if not isinstance(self._mapping[key], Variable):
              raise ValueError(
                  f"Trying to set key {key} to a leaf value "
                  f"but current value is not a Variable: {self._mapping[key]}."
              )
          self._mapping[key].value = value
  
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 6 for calling the State obj's underlying member method code with example usage: obj.__setitem__(key, value) without return types