DataTableType lookupTableTypeByType(Type type) {
        return lookupTableTypeByType(type, Function.identity());
    }
@Test
    void null_double_transformed_to_null() {
        DataTableTypeRegistry registry = new DataTableTypeRegistry(Locale.ENGLISH);
        DataTableType dataTableType = registry.lookupTableTypeByType(LIST_OF_LIST_OF_DOUBLE);
        assertEquals(
            singletonList(singletonList(null)),
            dataTableType.transform(singletonList(singletonList(null))));

    }