public void addObjectPartForAbsentKey(Object key, Object value, VersionTag version) {
    addPart(key, value, KEY_NOT_AT_SERVER, version);
  }
Add a part for a destroyed or missing entry. If the version tag is not null this represents a
tombstone.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/VersionedObjectList.java