code: def test_fullscreen(renderer_interactive_pyvistaqt):
      """Test fullscreen mode."""
      from mne.gui import coregistration
  
      # Fullscreen mode
      coreg = coregistration(
          subject="sample", subjects_dir=subjects_dir, fullscreen=True
      )
      coreg._accept_close_event = True
      coreg.close()
  
imports: import os
  from contextlib import nullcontext
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose
  import mne
  from mne._fiff.constants import FIFF
  from mne.channels import DigMontage
  from mne.coreg import Coregistration
  from mne.datasets import testing
  from mne.io import read_info
  from mne.io.kit.tests import data_dir
  from mne.utils import catch_logging, get_config
  from mne.viz import _3d
label_desc: Use image node_id 3 for calling a global function with example usage: test_fullscreen(renderer_interactive_pyvistaqt) without return types