code: def register_vcs_handler(
      vcs: str, method: str
  ) -> Callable:  # decorator
      """Create decorator to mark a method as the handler of a VCS."""
  
      def decorate(f: Callable) -> Callable:
          """Store f in HANDLERS[vcs][method]."""
          if vcs not in HANDLERS:
              HANDLERS[vcs] = {}
          HANDLERS[vcs][method] = f
          return f
  
      return decorate
  
imports: from __future__ import annotations
  import errno
  import functools
  import os
  import re
  import subprocess
  import sys
  from typing import Any, Callable
label_desc: Use image node_id 3 for calling a global function with example usage: register_vcs_handler(vcs, method) and returns: decorate, f