langchain/document_loaders/figma.py/FigmaFileLoader/_get_figma_file
class FigmaFileLoader:    def _get_figma_file(self) -> Any:
        """Get Figma file from Figma REST API."""
        headers = {"X-Figma-Token": self.access_token}
        request = urllib.request.Request(
            self._construct_figma_api_url(), headers=headers
        )
        with urllib.request.urlopen(request) as response:
            json_data = json.loads(response.read().decode())
            return json_data