public Builder clearAes128() {
      if (aes128Builder_ == null) {
        if (encryptionModeCase_ == 4) {
          encryptionModeCase_ = 0;
          encryptionMode_ = null;
          onChanged();
        }
      } else {
        if (encryptionModeCase_ == 4) {
          encryptionModeCase_ = 0;
          encryptionMode_ = null;
        }
        aes128Builder_.clear();
      }
      return this;
    }
<pre>
Configuration for HLS AES-128 encryption.
</pre>

<code>.google.cloud.video.livestream.v1.Encryption.Aes128Encryption aes128 = 4;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Encryption.java