code: def test_decoding(self):
      decoder = Sequence([CTC(), Metaspace()])
      initial = ["▁", "▁", "H", "H", "i", "i", "▁", "y", "o", "u"]
      expected = "Hi you"
      assert decoder.decode(initial) == expected
  
imports: import json
  import pickle
  import pytest
  from tokenizers.decoders import CTC, BPEDecoder, ByteLevel, Decoder, Metaspace, Sequence, WordPiece, ByteFallback, Replace, Strip, Fuse
label_desc: Use image node_id 2 for calling the TestSequenceDecoder obj's underlying member method code with example usage: obj.test_decoding() without return types