def get_schema(self, refresh: bool = False) -> str:
        """Get the schema of the Neptune KG store."""
        if refresh or not self.schema:
            self.schema = refresh_schema(self.query, self._get_summary())["schema_str"]

        return self.schema
Get the schema of the Neptune KG store.
llama-index-integrations/graph_stores/llama-index-graph-stores-neptune/llama_index/graph_stores/neptune/base.py