return null;
                }

                // Check for nested map
                if (params.containsKey("nested") && params.get("nested") instanceof Map) {
                    @SuppressWarnings("unchecked")
                    Map<String, Object> nestedMap = (Map<String, Object>) params.get("nested");
                    if (nestedMap.containsKey("innerKey")) {

    }

    // Test evaluate method with nested expressions
    public void test_evaluate_withNestedExpressions() {
        String template = "${level1.level2.value}";
        Map<String, Object> paramMap = new HashMap<>();
        Map<String, Object> level2 = new HashMap<>();
        level2.put("value", "nested");
        Map<String, Object> level1 = new HashMap<>();

    }

    public void test_complexDocumentStructure() {
        // Test with complex nested document structure
        Map<String, Object> doc = new HashMap<>();
        doc.put("id", "complex");

        Map<String, Object> nested = new HashMap<>();
        nested.put("level2", "value");
        doc.put("nested", nested);

        List<String> list = new ArrayList<>();
        list.add("item1");

        }
    }

    public void test_execute_withNestedBoostQuery() {
        // Test executing BoostQuery with another BoostQuery inside (nested boost)
        Term term = new Term("field", "nested");
        TermQuery termQuery = new TermQuery(term);
        BoostQuery innerBoostQuery = new BoostQuery(termQuery, 2.0f);
        BoostQuery outerBoostQuery = new BoostQuery(innerBoostQuery, 3.0f);

        assertEquals(3.14, result.get("double"));
        assertEquals(false, result.get("boolean"));
        assertNull(result.get("null_value"));
        assertNotNull(result.get("nested"));
        assertEquals("nested_value", ((Map<String, Object>) result.get("nested")).get("nested_key"));
    }

    // Test interface contract consistency
    public void test_interfaceContract() {

        params.put("long", 123456789L);
        params.put("boolean", true);
        params.put("double", 3.14);

        Map<String, Object> nestedMap = new HashMap<>();
        nestedMap.put("nested-key", "nested-value");
        params.put("map", nestedMap);

        IndexUpdateCallback callback = new TestIndexUpdateCallback();

        // Execute store
        dataStore.store(config, callback, params);

    }

    public void test_constructor_withNestedCause() {
        // Test constructor with nested exception causes
        Throwable rootCause = new IllegalArgumentException("Root cause");
        Throwable middleCause = new IllegalStateException("Middle cause", rootCause);
        String message = "Command execution failed with nested exception";

        assertNotNull(exception);
        assertTrue(exception instanceof java.io.Serializable);
    }

    public void test_nestedExceptions() {
        // Test nested exception handling
        Exception innerCause = new IllegalArgumentException("Invalid parameter");
        RuntimeException middleCause = new RuntimeException("Processing failed", innerCause);

        complexObject.put("nested", "value");

        dataStoreParams.put("complexKey", complexObject);
        assertEquals(complexObject, dataStoreParams.get("complexKey"));

        String asString = dataStoreParams.getAsString("complexKey");
        assertNotNull(asString);
        assertTrue(asString.contains("nested"));
    }

    // Test overwriting existing values

        booleanData.put("flag", true);
        callback.store(params, booleanData);

        // Test with nested map
        Map<String, Object> nestedData = new HashMap<>();
        Map<String, String> innerMap = new HashMap<>();
        innerMap.put("inner", "value");
        nestedData.put("nested", innerMap);
        callback.store(params, nestedData);

        assertEquals(4L, callback.getDocumentSize());
    }