from typing import Any, Dict from typing_extensions import Protocol from stripe._stripe_object import StripeObject class _Verifiable(Protocol): def instance_url(self) -> str: ... def _request( self, method: str, url: str, params: Dict[str, Any], ) -> StripeObject: ... class VerifyMixin(object): def verify(self: _Verifiable, **params): url = self.instance_url() + "/verify" return self._request("post", url, params=params)