code: def serialize_directory(directory_path):
      """Seriliaze the directory as a string."""
      tar_buffer = io.BytesIO()
      with tarfile.open(fileobj=tar_buffer, mode="w") as tar:
          tar.add(
              directory_path, arcname=os.path.basename(directory_path)
          )
  
      # Convert the binary data to a base64-encoded string
      serialized_string = base64.b64encode(tar_buffer.getvalue())
      return serialized_string
  
imports: from __future__ import annotations
  import base64
  from collections.abc import Sequence
  import io
  import os
  import tarfile
  from typing import Callable, Optional
  from absl.testing import absltest
  from jax import config
  from jax._src import test_util
  from jax._src.internal_test_util import export_back_compat_test_util
  from jax._src.lib import xla_extension
  from jax.experimental import jax2tf
  from jax.experimental.jax2tf.tests.back_compat_testdata import tf_call_tf_function
  import jax.numpy
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: serialize_directory(directory_path) and returns: serialized_string