code: def save_device_memory_profile(
      filename, backend: str | None = None
  ) -> None:
      """Collects a device memory profile and writes it to a file.
  
      :func:`save_device_memory_profile` is a convenience wrapper around :func:`device_memory_profile`
      that saves its output to a ``filename``. See the
      :func:`device_memory_profile` documentation for more information.
  
      Args:
        filename: the filename to which the profile should be written.
        backend: optional; the name of the JAX backend for which the device memory
          profile should be collected.
      """
      profile = device_memory_profile(backend)
      with open(filename, "wb") as f:
          f.write(profile)
  
imports: from __future__ import annotations
  from contextlib import contextmanager
  from functools import wraps
  import glob
  import gzip
  import http.server
  import json
  import logging
  import os
  import socketserver
  import threading
  from typing import Callable
  from jax._src import traceback_util
  from jax._src import xla_bridge
  from jax._src.lib import xla_client
label_desc: Use image node_id 11 for calling a global function with example usage: save_device_memory_profile(filename, backend) without return types