docstr: Decode ids into a string.
docstr_tok: ["Decode","ids","into","a","string","."]
code: def decode(self, tokens):
      """Decode ids into a string."""
      tokens = [i for i in tokens if i >= 0]
      text = "".join([self.decoder[x] for x in tokens])
      return text
  
imports: import jieba
  import pkg_resources
  import io
  from typing import IO
label_desc: Use image node_id 13 for calling the CPMAntTokenizer obj's underlying member method code with example usage: obj.decode(tokens) and returns: text