docs: def instantiate(config):
  
      """
      instantiate all registered vodka applications
  
      Args:
          config (dict or MungeConfig): configuration object
      """
  
      for handle, cfg in list(config["apps"].items()):
          if not cfg.get("enabled", True):
              continue
          app = get_application(handle)
          instances[app.handle] = app(cfg)