@Override public HashSlotCursor16byteKey cursor() {
        return new CursorLongKey2();
    }
@Test
    public void testCursor_key2() {
        final long key1 = randomKey();
        final long key2 = randomKey();
        insert(key1, key2);

        HashSlotCursor16byteKey cursor = hsa.cursor();
        cursor.advance();
        assertEquals(key2, cursor.key2());
    }