class Config:
            extra = "allow"


class Contact(BaseModelWithConfig):
    name: Optional[str] = None
    url: Optional[AnyUrl] = None
    email: Optional[EmailStr] = None


class License(BaseModelWithConfig):
    name: str
    identifier: Optional[str] = None
    url: Optional[AnyUrl] = None


class Info(BaseModelWithConfig):
    title: str
    summary: Optional[str] = None