public Builder clearAes128() {
      if (aes128Builder_ == null) {
        if (encryptionModeCase_ == 3) {
          encryptionModeCase_ = 0;
          encryptionMode_ = null;
          onChanged();
        }
      } else {
        if (encryptionModeCase_ == 3) {
          encryptionModeCase_ = 0;
          encryptionMode_ = null;
        }
        aes128Builder_.clear();
      }
      return this;
    }
<pre>
Configuration for AES-128 encryption.
</pre>

<code>.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption aes_128 = 3;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Encryption.java