code: def parse_marker(source: str) -> MarkerList:
      return _parse_marker(Tokenizer(source, rules=DEFAULT_RULES))
  
imports: import ast
  from typing import Any, List, NamedTuple, Optional, Tuple, Union
  from ._tokenizer import DEFAULT_RULES, Tokenizer
label_desc: Use image node_id 9 for calling a global function with example usage: parse_marker(source) and returns: _parse_marker