def _get_card_ids_from_collection_ids(self, collection_ids: List[str]) -> List[str]:
        """Get card ids from collection ids."""
        all_ids = []
        for collection_id in collection_ids:
            card_ids = self._get_card_ids_from_collection_id(collection_id)
            all_ids.extend(card_ids)
        return all_ids
Get card ids from collection ids.
llama-index-integrations/readers/llama-index-readers-guru/llama_index/readers/guru/base.py