code: def test_vermin() -> None:
      chdir(TOP_PATH)
      pyproject = toml.load(TOP_PATH / "pyproject.toml")
      minpy = pyproject["project"]["requires-python"].lstrip(">=")
      cmd = f"vermin --eval-annotations --no-tips -t={minpy} -vvv --lint src/bokeh".split()
      proc = run(cmd, capture_output=True)
      assert (
          proc.returncode == 0
      ), f"vermin issues:\n{proc.stdout.decode('utf-8')}"
  
imports: from __future__ import annotations
  import pytest
  from os import chdir
  from subprocess import run
  import toml
  from tests.support.util.project import TOP_PATH
label_desc: Use image node_id 1 for calling a global function with example usage: test_vermin() without return types