public Builder mergeMpegCenc(
        com.google.cloud.video.livestream.v1.Encryption.MpegCommonEncryption value) {
      if (mpegCencBuilder_ == null) {
        if (encryptionModeCase_ == 6
            && encryptionMode_
                != com.google.cloud.video.livestream.v1.Encryption.MpegCommonEncryption
                    .getDefaultInstance()) {
          encryptionMode_ =
              com.google.cloud.video.livestream.v1.Encryption.MpegCommonEncryption.newBuilder(
                      (com.google.cloud.video.livestream.v1.Encryption.MpegCommonEncryption)
                          encryptionMode_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          encryptionMode_ = value;
        }
        onChanged();
      } else {
        if (encryptionModeCase_ == 6) {
          mpegCencBuilder_.mergeFrom(value);
        } else {
          mpegCencBuilder_.setMessage(value);
        }
      }
      encryptionModeCase_ = 6;
      return this;
    }
<pre>
Configuration for MPEG-Dash Common Encryption (MPEG-CENC).
</pre>

<code>.google.cloud.video.livestream.v1.Encryption.MpegCommonEncryption mpeg_cenc = 6;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Encryption.java