assertEquals("Set contents should match", original, deserialized);
    }

    /**
     * Test serialization of TreeMap
     */
    @Test
    public void test_serializeDeserialize_treeMap() {
        TreeMap<String, Integer> original = new TreeMap<>();
        original.put("alpha", 1);
        original.put("beta", 2);
        original.put("gamma", 3);