code: def _make_refspec_from_version(version: Optional[str]) -> List[str]:
      """Create a refspec that checks for the existence of origin/main and the version."""
      if version:
          return [f"+{version}"]
  
      return [
          "+refs/heads/main*:refs/remotes/origin/main*",
          "+refs/heads/master*:refs/remotes/origin/master*",
      ]
  
imports: import asyncio
  import json
  import logging
  import os
  import platform
  import re
  import subprocess
  import sys
  from collections import defaultdict
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, cast
  import click
  import wandb
  import wandb.docker
  from wandb import util
  from wandb.apis.internal import Api
  from wandb.errors import CommError
  from wandb.sdk.launch.errors import LaunchError
  from wandb.sdk.launch.git_reference import GitReference
  from wandb.sdk.launch.wandb_reference import WandbReference
  from wandb.sdk.wandb_config import Config
  from .builder.templates._wandb_bootstrap import FAILED_PACKAGES_POSTFIX, FAILED_PACKAGES_PREFIX
label_desc: Use image node_id 23 for calling a global function with example usage: _make_refspec_from_version(version) and returns: list, list