@Override
    public void deserialize(final RemoteData remoteData) {
        setServiceId(remoteData.getDataStrings(0));
        setServiceLayer(Layer.valueOf(remoteData.getDataIntegers(0)));
        setRelatedServiceId(remoteData.getDataStrings(1));
        setRelatedServiceLayer(Layer.valueOf(remoteData.getDataIntegers(1)));
        setTimeBucket(remoteData.getDataLongs(0));
    }
The service layer of the lower service.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/hierarchy/service/ServiceHierarchyRelationTraffic.java