@Override
        public void entity2Storage(ServiceLabelRecord entity, Convert2Storage converter) {
            converter.accept(SERVICE_ID, entity.getServiceId());
            converter.accept(LABEL, entity.getLabel());
            converter.accept(TIME_BUCKET, entity.getTimeBucket());
        }
Process have multiple labels, such as tag.
{@link ServiceLabelRecord} could combine them in the service level.
It could help to quickly locate the similar process by the service and label.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/manual/process/ServiceLabelRecord.java