code: def backend_pjrt_c_api_version(
      platform=None,
  ) -> tuple[int, int] | None:
      """Returns the PJRT C API version of the backend.
  
      Returns None if the backend does not use PJRT C API.
      """
      backend = get_backend(platform)
      if hasattr(backend, "pjrt_c_api_major_version") and hasattr(
          backend, "pjrt_c_api_minor_version"
      ):
          return (
              backend.pjrt_c_api_major_version,
              backend.pjrt_c_api_minor_version,
          )
      return None
  
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 29 for calling a global function with example usage: backend_pjrt_c_api_version(platform) and returns: None, backend,  backend