@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(1, scheme_);
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
Required. Specify the encryption scheme, supported schemes:
- `cenc` - AES-CTR subsample
- `cbcs`- AES-CBC subsample pattern
</pre>

<code>string scheme = 1 [(.google.api.field_behavior) = REQUIRED];</code>

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