@Override
  public JsonObjectBuilder getJsonObjectBuilder() {
    return super.getJsonObjectBuilder()
      .add("payloadType", this.payloadType)
      .add("clockRate", this.clockRate)
      .add("channels", this.channels)
      .add("codecType", this.codecType)
      .add("mimeType", this.mimeType)
      .add("sdpFmtpLine", this.sdpFmtpLine);
  }
RTCCodecStats, with attributes payloadType, codecType, clockRate, channels, sdpFmtpLine
KITE-Framework/src/main/java/org/webrtc/kite/stats/rtc/RTCCodecStats.java