public ByteBuffer getEncryptionKey() {
    return encryptionKey;
  }
Deserialize a metadata content record from a stream.
@param stream The stream to read the serialized record from.
@param storeKeyFactory The factory to use for parsing keys in the serialized metadata content record.
@return A {@link CompositeBlobInfo} object with the chunk size and list of keys from the record.
@throws IOException
ambry-messageformat/src/main/java/com/github/ambry/messageformat/MessageFormatRecord.java