 a data structure to mean that the object
 being referenced has logically been deleted.

 The <code><a href="../../../../../reference/java/util/concurrent/atomic/AtomicStampedReference.html">AtomicStampedReference</a></code>
 class associates an integer value with a reference.  This may be
 used for example, to represent version numbers corresponding to
 series of updates.

 <p>Atomic classes are designed primarily as building blocks for
 implementing non-blocking data structures and related infrastructure
