langchain/document_loaders/unstructured.py/UnstructuredAPIFileLoader/__init__
class UnstructuredAPIFileLoader:    def __init__(
        self,
        file_path: Union[str, List[str]] = "",
        mode: str = "single",
        url: str = "https://api.unstructured.io/general/v0/general",
        api_key: str = "",
        **unstructured_kwargs: Any,
    ):
        """Initialize with file path."""

        if isinstance(file_path, str):
            validate_unstructured_version(min_unstructured_version="0.6.2")
        else:
            validate_unstructured_version(min_unstructured_version="0.6.3")

        self.url = url
        self.api_key = api_key

        super().__init__(file_path=file_path, mode=mode, **unstructured_kwargs)