@Override
  public JsonObjectBuilder getJsonObjectBuilder() {
    return super.getJsonObjectBuilder()
        .add("localId", this.localId)
        .add("remoteTimestamp", this.remoteTimestamp);
  }
Represent RTCRtpStreamStats, outbound and inbound, sent and received.
KITE-Framework/src/main/java/org/webrtc/kite/stats/rtc/rtpstream/RTCRemoteOutboundRtpStreamStats.java