langchain/tools/steamship_image_generation/tool.py/SteamshipImageGenerationTool/_arun
class SteamshipImageGenerationTool:    async def _arun(
        self,
        query: str,
        run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
    ) -> str:
        """Use the tool asynchronously."""
        raise NotImplementedError("GenerateImageTool does not support async")