def is_error(self) -> IsErrorRequestBuilder:
        """
        Provides operations to call the isError method.
        """
        from .is_error.is_error_request_builder import IsErrorRequestBuilder

        return IsErrorRequestBuilder(self.request_adapter, self.path_parameters)

        Provides operations to call the isError method.
        
msgraph/generated/drives/item/items/item/workbook/functions/functions_request_builder.py