code: def lineof(self, name: str) -> int | None:
      return self.config.lineof(self.name, name)
  
imports: from __future__ import annotations
  from typing import Callable, Iterator, Mapping, Optional, Tuple, TypeVar, Union, TYPE_CHECKING, NoReturn, NamedTuple, overload, cast
  import os
  from .exceptions import ParseError
  from .None import _parse
  from ._parse import COMMENTCHARS, iscommentline
label_desc: Use image node_id 2 for calling the SectionWrapper obj's underlying member method code with example usage: obj.lineof(name) and returns: self