code: def encode(self, x: str) -> str:
      return " ".join(self.word_tokenize(x))
  
imports: from fairseq.data.encoders import register_tokenizer
  from fairseq.dataclass import FairseqDataclass
label_desc: Use image node_id 2 for calling the NLTKTokenizer obj's underlying member method code with example usage: obj.encode(x) and returns: str