String deleteAll(int n) {
        return deleteAllQueries.computeIfAbsent(n, deleteAllFactory);
    }
@Test
    public void testDeleteAllIsQuoted() {
        Queries queries = new Queries(mapping, idColumn, columnMetadata);
        String result = queries.deleteAll(2);
        assertEquals("DELETE FROM \"mymapping\" WHERE \"id\" IN (?, ?)", result);
    }