code: def test_merge_events():
      """Test event merging."""
      events_orig = [[1, 0, 1], [3, 0, 2], [10, 0, 3], [20, 0, 4]]
  
      events_replacement = [
          [1, 0, 12],
          [3, 0, 12],
          [10, 0, 34],
          [20, 0, 34],
      ]
  
      events_no_replacement = [
          [1, 0, 1],
          [1, 0, 12],
          [1, 0, 1234],
          [3, 0, 2],
          [3, 0, 12],
          [3, 0, 1234],
          [10, 0, 3],
          [10, 0, 34],
          [10, 0, 1234],
          [20, 0, 4],
          [20, 0, 34],
          [20, 0, 1234],
      ]
  
      for replace_events, events_good in [
          (True, events_replacement),
          (False, events_no_replacement),
      ]:
          events = merge_events(events_orig, [1, 2], 12, replace_events)
          events = merge_events(events, [3, 4], 34, replace_events)
          events = merge_events(
              events, [1, 2, 3, 4], 1234, replace_events
          )
          assert_array_equal(events, events_good)
  
imports: import os
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_almost_equal, assert_array_equal, assert_equal
  from mne import Annotations, Epochs, compute_raw_covariance, count_events, create_info, find_events, find_stim_steps, make_fixed_length_events, pick_channels, pick_events, read_events, read_evokeds, write_events
  from mne.datasets import testing
  from mne.event import AcqParserFIF, define_target_events, match_event_names, merge_events, shift_time_events
  from mne.io import RawArray, read_raw_fif
label_desc: Use image node_id 3 for calling a global function with example usage: test_merge_events() without return types