private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption,
            com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption.Builder,
            com.google.cloud.video.transcoder.v1.Encryption.Aes128EncryptionOrBuilder>
        getAes128FieldBuilder() {
      if (aes128Builder_ == null) {
        if (!(encryptionModeCase_ == 3)) {
          encryptionMode_ =
              com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption.getDefaultInstance();
        }
        aes128Builder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption,
                com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption.Builder,
                com.google.cloud.video.transcoder.v1.Encryption.Aes128EncryptionOrBuilder>(
                (com.google.cloud.video.transcoder.v1.Encryption.Aes128Encryption) encryptionMode_,
                getParentForChildren(),
                isClean());
        encryptionMode_ = null;
      }
      encryptionModeCase_ = 3;
      onChanged();
      return aes128Builder_;
    }
<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