@Override
  public int getSizeInBytes() {

    int size = CONSTANT_MEMORY_OVERHEAD;

    // The value (a byte[])
    if (_value != null) {
      size += CachedDeserializableFactory.calcMemSize(_value);
    }

    // The sizeOf call gets the size of the input callback argument.
    size += sizeOf(getOriginalCallbackArgument());
    return size;
  }
@see HAEventWrapper#fromData(DataInput, DeserializationContext)
@see HAContainerRegion#get(Object)
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ClientUpdateMessageImpl.java