# Using Any for Specification Extensions
    callbacks: Optional[Dict[str, Union[Dict[str, PathItem], Reference, Any]]] = None
    pathItems: Optional[Dict[str, Union[PathItem, Reference]]] = None


class Tag(BaseModelWithConfig):
    name: str
    description: Optional[str] = None
    externalDocs: Optional[ExternalDocumentation] = None


class OpenAPI(BaseModelWithConfig):
    openapi: str
    info: Info