code: def test_decode(self):
      sp_tokenizer = SPEandWordTokenizer.from_config(
          SPEandWordTokenizer.Config(
              sp_model_path="pytext/data/test/data/sentencepiece.model",
              ontology_vocab_path="pytext/data/test/data/spm_ontology.txt",
              ontology_vocab_lowercase=True,
              lowercase=True,
          )
      )
      returned_str = sp_tokenizer.decode("testing ▁out ▁sen t ence")
      self.assertEqual(returned_str, "testing out sentence")
  
imports: import unittest
  from pytext.data.tokenizers import GPT2BPETokenizer, SentencePieceTokenizer, SPEandWordTokenizer, Tokenizer, WordPieceTokenizer
  from pytext.data.tokenizers.tokenizer import Token
label_desc: Use image node_id 2 for calling the SPEandWordTokenizerTest obj's underlying member method code with example usage: obj.test_decode() without return types