code: def event_channel_links():
      """Fixture that makes sure each test starts with a fresh channel links dict."""
      ui_events._event_channel_links.clear()
      return ui_events._event_channel_links
  
file_path: mne-python/mne/viz/tests/test_ui_events.py
imports: import matplotlib.pyplot
  import pytest
  from mne.datasets import testing
  from mne.viz import ui_events
label_desc: Use image node_id 2 for calling a global function with example usage: event_channel_links() and returns: ui_events