langchain/document_loaders/generic.py/GenericLoader/load_and_split
class GenericLoader:    def load_and_split(
        self, text_splitter: Optional[TextSplitter] = None
    ) -> List[Document]:
        """Load all documents and split them into sentences."""
        raise NotImplementedError(
            "Loading and splitting is not yet implemented for generic loaders. "
            "When they will be implemented they will be added via the initializer. "
            "This method should not be used going forward."
        )