code: def transfer_cache(
      self,
      config: TransformerConfig,
      cache_nnx: nnx.State,
      cache_linen: dict[str, Any],
  ):
      flat_cache_nnx = cache_nnx.flat_state()
      flat_cache_linen = traverse_util.flatten_dict(
          cache_linen, sep="/"
      )
  
      def copy_var(nnx_name, linen_name):
          assert (
              flat_cache_nnx[nnx_name].value.shape
              == flat_cache_linen[linen_name].shape
          )
          flat_cache_nnx[nnx_name].value = flat_cache_linen[linen_name]
  
      for idx in range(config.num_layers):
          copy_var(
              f"decoder/encoderdecoderblock_{idx}/attention/cache_index",
              f"decoder/encoderdecoderblock_{idx}/MultiHeadDotProductAttention_0/cache_index",
          )
          copy_var(
              f"decoder/encoderdecoderblock_{idx}/attention/cached_key",
              f"decoder/encoderdecoderblock_{idx}/MultiHeadDotProductAttention_0/cached_key",
          )
          copy_var(
              f"decoder/encoderdecoderblock_{idx}/attention/cached_value",
              f"decoder/encoderdecoderblock_{idx}/MultiHeadDotProductAttention_0/cached_value",
          )
  
      copy_var(
          "decoder/posembed_output/cache_index",
          "decoder/posembed_output/cache_index",
      )
  
imports: from __future__ import annotations
  import sys
  from pathlib import Path
  from typing import Any
  from examples.lm1b.models import TransformerLM
  import dataclasses
  import jax
  import jax.numpy
  from absl.testing import absltest
  from jax import random
  from flax import traverse_util
  from flax.experimental import nnx
  from flax.experimental.nnx.examples.lm1b.configs import default
  from flax.experimental.nnx.examples.lm1b.utils import HasCache
  from flax.experimental.nnx.examples.lm1b.models import TransformerConfig, TransformerLM
label_desc: Use image node_id 2 for calling the ModelTest obj's underlying member method code with example usage: obj.transfer_cache(config, cache_nnx, cache_linen) without return types