public boolean isEmpty() {
    return this.codecId == null || this.codecId.length() == 0 || "NA".equalsIgnoreCase(this.codecId);
  }
Represent RTCRtpStreamStats, outbound and inbound, sent and received.
KITE-Framework/src/main/java/org/webrtc/kite/stats/rtc/rtpstream/RTCRtpStreamStats.java