code: public final void messageUnlocked(AIStreamKey key)
    {
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) 
        SibTr.entry(this, tc, "messageUnlocked", key);
      synchronized (this)
      {
        countOfUnlockedMessages++;
        
        if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
            SibTr.debug(tc, "readAhead change: countOfUnlockedMessages++ " + countOfUnlockedMessages);
      }
      if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) 
        SibTr.exit(this, tc, "messageUnlocked");
    }
docs: Message that was requested by this consumer has been unlocked.
  This method will never be called for messages received due to gets issued by the
  RemoteQPConsumerKeyGroup
  @param key