code: def test_plot_epochs_selection_butterfly(raw, browser_backend):
      """Test that using selection and butterfly works."""
      events = make_fixed_length_events(raw)[:1]
      epochs = Epochs(
          raw, events, tmin=0, tmax=0.5, preload=True, baseline=None
      )
      assert len(epochs) == 1
      epochs.plot(group_by="selection", butterfly=True)
  
imports: import platform
  import matplotlib.pyplot
  import numpy
  import pytest
  from mne import Epochs, EpochsArray, create_info
  from mne.datasets import testing
  from mne.event import make_fixed_length_events
  from mne.viz import plot_drop_log
label_desc: Use image node_id 19 for calling a global function with example usage: test_plot_epochs_selection_butterfly(raw, browser_backend) without return types