class_docstr: Encapsulates the roberta tokenizer
class_docstr_tok: ["Encapsulates","the","roberta","tokenizer"]
code: def _get_surface_string(self, raw_token: str) -> str:
      raise NotImplementedError()
  
file_path: scattertext/scattertext/tokenizers/transformers.py
imports: import abc
  from abc import ABC
  from scattertext.WhitespaceNLP import Tok, _get_pos_tag, Doc
label_desc: Use image node_id 3 for calling the TransformerTokenizerWrapper obj's underlying member method code with example usage: obj._get_surface_string(raw_token) without return types