private void setOldValueIsSerialized(boolean isSerialized) {
    // Defer serialization until toData is called.
    // VALUE_IS_BYTES;
    oldValueIsSerialized = isSerialized; // VALUE_IS_SERIALIZED_OBJECT;
  }
Assists the toString method in reporting the contents of this message
geode-core/src/main/java/org/apache/geode/internal/cache/tx/RemoteDestroyMessage.java