langchain/tools/graphql/tool.py/BaseGraphQLTool/_arun
class BaseGraphQLTool:    async def _arun(
        self,
        tool_input: str,
        run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
    ) -> str:
        """Use the Graphql tool asynchronously."""
        raise NotImplementedError("GraphQLAPIWrapper does not support async")