@Override
    public void fromDelta(DataInput in) throws IOException {
      FROM_DELTA_INVOKED.set(true);
      value = DataSerializer.readPrimitiveInt(in);
    }
Object that implements {@code Delta} for use in {@code Cache}.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/tier/sockets/ClientProxyWithDeltaDistributedTest.java