code: def git_existing_tags() -> Set[Text]:
      """Return all existing tags in the local git repo."""
  
      stdout = check_output(["git", "tag"])
      return set(stdout.decode().split("\n"))
  
imports: import argparse
  import os
  import re
  import sys
  from pathlib import Path
  from subprocess import CalledProcessError, check_call, check_output
  from typing import Text, Set
  import questionary
  import toml
  from pep440_version_utils import Version, is_valid_version
label_desc: Use image node_id 12 for calling a global function with example usage: git_existing_tags() and returns: set