code: def pytest_cmdline_main(
      config: "Config",
  ) -> Optional[Union["ExitCode", int]]:
      """Called for performing the main command line action.
  
      The default implementation will invoke the configure hooks and
      :hook:`pytest_runtestloop`.
  
      Stops at first non-None result, see :ref:`firstresult`.
  
      :param config: The pytest config object.
      :returns: The exit code.
      """
  
imports: from pathlib import Path
  from typing import Any
  from typing import Dict
  from typing import List
  from typing import Mapping
  from typing import Optional
  from typing import Sequence
  from typing import Tuple
  from typing import TYPE_CHECKING
  from typing import Union
  from pluggy import HookspecMarker
label_desc: Use image node_id 7 for calling a global function with example usage: pytest_cmdline_main(config) without return types