langchain/document_loaders/stripe.py/StripeLoader/_make_request
class StripeLoader:    def _make_request(self, url: str) -> List[Document]:
        request = urllib.request.Request(url, headers=self.headers)

        with urllib.request.urlopen(request) as response:
            json_data = json.loads(response.read().decode())
            text = stringify_dict(json_data)
            metadata = {"source": url}
            return [Document(page_content=text, metadata=metadata)]