class_docstr: Caching wrapper for the tokenize module.
  
  This is pretty tied to Python's syntax.
code: def mark(self) -> Mark:
      return self._index
  
file_path: cpython/Tools/peg_generator/pegen/tokenizer.py
imports: import token
  import tokenize
  from typing import Dict, Iterator, List
label_desc: Use image node_id 7 for calling the Tokenizer obj's underlying member method code with example usage: obj.mark() and returns: self