class_docstr: Constructs an ESM tokenizer.
class_docstr_tok: ["Constructs","an","ESM","tokenizer","."]
code: def _convert_id_to_token(self, index: int) -> str:
      return self._id_to_token.get(index, self.unk_token)
  
imports: import os
  from typing import List, Optional, Union
  from ...tokenization_utils import PreTrainedTokenizer
  from ...tokenization_utils_base import AddedToken
  from ...utils import logging
label_desc: Use image node_id 2 for calling the EsmTokenizer obj's underlying member method code with example usage: obj._convert_id_to_token(index) and returns: self