code: def _header(header: str, level: int) -> str:
      return f"{header}\n{RST_LEVEL_SYMBOLS[level] * len(header)}"
  
imports: import inspect
  from dataclasses import dataclass
  from pathlib import Path
  from types import ModuleType
  from typing import Any, Callable, Deque, Dict, List, Mapping, Set, TextIO, Tuple, Type, Union
  from gpflow.utilities import Dispatcher
label_desc: Use image node_id 1 for calling a global function with example usage: _header(header, level) and returns: header, str, unknown