@Override
  public boolean isInvalidOrRemoved() {
    return Token.isInvalidOrRemoved(getValueAsToken());
  }
for an event containing a delta we must check to see if the tag's previous member id is the
stamp's member id and ensure that the version is only incremented by 1. Otherwise the delta is
being applied to a value that does not match the source of the delta.
geode-core/src/main/java/org/apache/geode/internal/cache/entries/AbstractRegionEntry.java