code: def test_tabs():
      """Test that there are no tabs in our source files."""
      for _, modname, ispkg in walk_packages(
          mne.__path__, prefix="mne."
      ):
          # because we don't import e.g. mne.tests w/mne
          if not ispkg and modname not in tab_ignores:
              try:
                  mod = importlib.import_module(modname)
              except Exception:  # e.g., mne.export not having pybv
                  continue
              source = inspect.getsource(mod)
              assert "\t" not in source, (
                  '"%s" has tabs, please remove them '
                  "or add it to the ignore list" % modname
              )
  
file_path: mne-python/mne/tests/test_docstring_parameters.py
imports: import importlib
  import inspect
  import re
  from pathlib import Path
  from pkgutil import walk_packages
  import pytest
  import mne
  from mne.utils import _pl, _record_warnings
label_desc: Use image node_id 4 for calling a global function with example usage: test_tabs() without return types