code: def register_pjrt_plugin_factories_from_env() -> None:
      """Registers backend factories for PJRT plugins.
  
      A backend factory will be registered for every PJRT plugin in the input
      string, in the format of 'name1:path1,name2:path2' ('name1;path1,name2;path2'
      for windows). The path can be a path to the plugin library or a path to the
      plugin configuration json file. The json file needs to have a "library_path"
      field for the plugin library path. It can have an optional "create_option"
      field for the options used when creating a PJRT plugin client. The value of
      "create_option" is key-value pairs. Please see xla_client._NameValueMapping
      for the supported types of values.
  
      TPU PJRT plugin will be loaded and registered separately in make_tpu_client.
      """
      pjrt_plugins = _get_pjrt_plugin_names_and_library_paths(
          os.getenv("PJRT_NAMES_AND_LIBRARY_PATHS", "")
      )
      for plugin_name, path in pjrt_plugins.items():
          if path.endswith(".json"):
              library_path, options = _get_pjrt_plugin_config(path)
          else:
              library_path = path
              options = None
          logger.debug(
              "registering PJRT plugin %s from %s",
              plugin_name,
              library_path,
          )
          register_plugin(
              plugin_name, library_path=library_path, options=options
          )
  
imports: from __future__ import annotations
  from __future__ import annotations
  from collections.abc import Mapping
  import dataclasses
  from functools import lru_cache, partial
  import importlib
  import json
  import logging
  import os
  import pkgutil
  import platform
  import sys
  import threading
  from typing import Any, Callable, Union
  import warnings
  from jax._src import config
  from jax._src import distributed
  from jax._src import traceback_util
  from jax._src import util
  from jax._src import hardware_utils
  from jax._src.cloud_tpu_init import maybe_import_libtpu
  from jax._src.lib import cuda_versions
  from jax._src.lib import xla_client
  from jax._src.lib import xla_extension
  from jax._src.lib import xla_extension_version
label_desc: Use image node_id 12 for calling a global function with example usage: register_pjrt_plugin_factories_from_env() without return types