@Override
      public DataSerializable newInstance() {
        return new DeltaQueuedSessionAttributes();
      }
This class implements delayed attribute delta propagation. Updates to attributes are only
propagated once the session goes out of scope - i.e. as the request is done being processed.
extensions/geode-modules-session-internal/src/main/java/org/apache/geode/modules/session/internal/filter/attributes/DeltaQueuedSessionAttributes.java