public void setHasOldValue(boolean value) {
    // override in subclasses which need old value to be serialized.
    // overridden by classes like PutMessage, DestroyMessage.
  }
added to support old value to be written on wire.

@param value true or false
@since GemFire 6.5
geode-core/src/main/java/org/apache/geode/internal/cache/tx/RemoteOperationMessage.java