code: def skip_if_wrong_backend(marker, item):
      valid_backend_names = marker.args
      environment_variable_name = "BACKEND"
      environment_variable_value = os.environ.get(
          environment_variable_name
      )
      if (
          not environment_variable_value
          or environment_variable_value not in valid_backend_names
      ):
          pytest.skip(
              f"The test requires one of {valid_backend_names} backend started and "
              f"{environment_variable_name} environment variable to be set to 'true' (it is "
              f"'{environment_variable_value}'). It can be set by specifying backend at breeze startup: {item}"
          )
  
imports: from __future__ import annotations
  import json
  import os
  import platform
  import subprocess
  import sys
  import warnings
  from contextlib import ExitStack, suppress
  from datetime import datetime, timedelta
  from pathlib import Path
  from typing import TYPE_CHECKING
  import pytest
  import time_machine
  from itsdangerous import URLSafeSerializer
label_desc: Use image node_id 22 for calling a global function with example usage: skip_if_wrong_backend(marker, item) without return types