public void setPossibleDuplicate(boolean possibleDuplicate) {
    this.possibleDuplicate = possibleDuplicate;
  }
If the value owned of this event is just bytes return that byte array; otherwise serialize the
value object and return the serialized bytes. Use {@link #getValueIsObject()} to determine if
the result is raw or serialized bytes.
geode-core/src/main/java/org/apache/geode/internal/cache/wan/GatewaySenderEventImpl.java