dataStoreParams.put("key1", null);
        assertNull(dataStoreParams.get("key1"));
    }

    // Test multiple operations in sequence
    @Test
    public void test_multipleOperations() {
        // Add initial values
        dataStoreParams.put("key1", "value1");
        dataStoreParams.put("key2", 123);

        // Add more values using putAll