code: def get_config_variable(incomplete: str):
      from hailtop.config import (
          get_user_config,
      )  # pylint: disable=import-outside-toplevel
  
      config = get_user_config()
  
      elements = []
      for section_name, section in config.items():
          for item_name, value in section.items():
              if section_name == "global":
                  path = item_name
              else:
                  path = f"{section_name}/{item_name}"
              elements.append((path, value))
  
      config_items = {
          var.name: var_info.help_msg
          for var, var_info in config_variables().items()
      }
  
      for name, _ in elements:
          if name.startswith(incomplete):
              help_msg = config_items.get(name)
              yield (name, help_msg)
  
file_path: hail/hail/python/hailtop/hailctl/config/cli.py
imports: import os
  import sys
  from typing import Optional, Tuple, Annotated
  from rich import print
  import typer
  from typer import Argument
  from hailtop.config.variables import ConfigVariable
  from .config_variables import config_variables
label_desc: Use image node_id 4 for calling a global function with example usage: get_config_variable(incomplete) without return types