code: def test_get_builtin_ch_adjacencies():
      """Test retrieving the names of all built-in FieldTrip neighbors."""
      names = get_builtin_ch_adjacencies()
      assert names
      assert len(names) == len(set(names))  # no duplicates
      assert len(names) == len(_BUILTIN_CHANNEL_ADJACENCIES)
  
      names_and_descriptions = get_builtin_ch_adjacencies(
          descriptions=True
      )
      for name_and_description in names_and_descriptions:
          assert len(name_and_description) == 2
  
imports: import hashlib
  from copy import deepcopy
  from functools import partial
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_equal, assert_equal
  from scipy.io import savemat
  from mne import Epochs, EpochsArray, EvokedArray, create_info, make_ad_hoc_cov, pick_channels, pick_types, read_events
  from mne._fiff.constants import FIFF, _ch_unit_mul_named
  from mne.channels import combine_channels, equalize_channels, find_ch_adjacency, get_builtin_ch_adjacencies, make_1020_channel_selections, read_ch_adjacency, read_custom_montage, rename_channels
  from mne.channels.channels import _BUILTIN_CHANNEL_ADJACENCIES, _BuiltinChannelAdjacency, _ch_neighbor_adjacency, _compute_ch_adjacency
  from mne.datasets import testing
  from mne.io import RawArray, read_info, read_raw_bti, read_raw_ctf, read_raw_eeglab, read_raw_fif, read_raw_kit
  from mne.parallel import parallel_func
  from mne.utils import requires_good_network
label_desc: Use image node_id 4 for calling a global function with example usage: test_get_builtin_ch_adjacencies() without return types