if (!NONE.equals(entry.advice)) { if (log.isWarnEnabled()) log.warn("LinksEnablingServiceImpl.enable: Ignored.  Agent="+agent+" already enabled."); } else { setAdvice(entry, NONE);
if (NONE.equals(entry.advice)) { setAdvice(entry, entry.previous);
	public void enable(MessageAddress agent) {	    synchronized (agents) {		AgentEntry entry = assureRegistered(agent);		if (!NONE.equals(entry.advice)) {		    if (log.isWarnEnabled())			log.warn("LinksEnablingServiceImpl.enable: Ignored.  Agent="+agent+" already enabled.");		} else {		    setAdvice(entry, NONE);		}	    }	}