code: def test_align_slot_labels(self):
      self.assertEqual(
          align_slot_labels(
              [[0, 4], [5, 8], [9, 14], [15, 19], [20, 25]],
              "20:25:music/type,5:14:music/artistName",
              True,
          ),
          "NoLabel B-music/artistName I-music/artistName NoLabel B-music/type",
      )
  
imports: import json
  import os
  import random
  import shutil
  import tempfile
  import unittest
  import numpy
  import torch
  from pytext.utils import recursive_map, round_seq, set_random_seeds
  from pytext.utils.data import align_slot_labels, merge_token_labels_to_slot, strip_bio_prefix, unkify
  from pytext.utils.distributed import get_shard_range
  from pytext.utils.file_io import chunk_file, PathManager
  from pytext.utils.meter import TimeMeter
  from pytext.utils.test import import_tests_module
label_desc: Use image node_id 2 for calling the UtilTest obj's underlying member method code with example usage: obj.test_align_slot_labels() without return types