// Test with empty map and null config
        paramMap = new HashMap<>();
        ParameterUtil.loadConfigParams(paramMap, null);
        assertEquals(0, paramMap.size());

        // Test with empty map and empty config
        paramMap = new HashMap<>();
        ParameterUtil.loadConfigParams(paramMap, "");
        assertEquals(0, paramMap.size());

        // Test with empty map and whitespace config