public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (elevateWordId != null) {
            addFieldToSource(sourceMap, "elevateWordId", elevateWordId);
        }
        if (labelTypeId != null) {
            addFieldToSource(sourceMap, "labelTypeId", labelTypeId);
        }
        return sourceMap;
    }