final Map<String, Object> source = toLowerHyphen(searchLogEvent.toSource());
        source.put("_id", searchLogEvent.getId());
        // source.put("version_no", searchLogEvent.getVersionNo());
        source.put("event_type", searchLogEvent.getEventType());
        return source;
    }

    /**
     * Converts a map to lower hyphen case.
     *
     * @param source The source map.
     * @return The converted map.

        private String id;
        private Long versionNo;
        private String eventType;
        private Map<String, Object> sourceMap;

        public TestSearchLogEvent(String id, Long versionNo, String eventType) {
            this.id = id;
            this.versionNo = versionNo;
            this.eventType = eventType;
            this.sourceMap = new HashMap<>();
        }

        @Override