code: public boolean cacheEntryEvicted(CacheEntry cacheEntry) {
  		final String sourceMethod = "cacheEntryEvicted"; //$NON-NLS-1$
  
  		boolean evicted = false;
  		SignalUtil.lock(cloneLock.readLock(), sourceClass, sourceMethod);
  		try {
  			if (cacheEntry.layerId == layerId) {
  				evicted = evictionLatch.decrement();
  			}
  		} finally {
  			cloneLock.readLock().unlock();
  		}
  		return evicted;
  	}
docs: Handles map entry eviction notifications. Decrements the entry
  counter for the layer. If the counter is decremented to zero, then
  the <code>_evicted</code> flag is set.
  
  @param cacheEntry
  the cache entry being evicted
  @return true if the <code>_evicted</code> flag was set