@java.lang.Override
    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(scheme_)) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, scheme_);
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
Required. Specify the encryption scheme.

Supported encryption schemes:

- `cenc`
- `cbcs`
</pre>

<code>string scheme = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for scheme.
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Encryption.java