code: def get_repo(self) -> Repo:
      return VirtualRepo(repo_id="none")
  
imports: import re
  from enum import Enum
  from typing import Dict, List, Optional, Union
  from pydantic import BaseModel, Field, ValidationError, conint, constr, validator
  from typing_extensions import Annotated, Literal
  from dstack._internal.core.errors import ConfigurationError
  from dstack._internal.core.models.common import ForbidExtra
  from dstack._internal.core.models.repos.base import Repo
  from dstack._internal.core.models.repos.virtual import VirtualRepo
label_desc: Use image node_id 3 for calling the BaseConfiguration obj's underlying member method code with example usage: obj.get_repo() and returns: VirtualRepo