code: def base_url(self, service, base_scheme="http"):
      return f"{self.scheme(base_scheme)}://{self.domain(service)}{self.base_path(service)}"
  
imports: from typing import Dict, Optional, TypeVar, Union
  import os
  import json
  import logging
  from ..utils import first_extant_file
  from .user_config import get_user_config
label_desc: Use image node_id 12 for calling the DeployConfig obj's underlying member method code with example usage: obj.base_url(service, base_scheme) and returns: self, str, self, self