docs: public void register(Pageable pageable) {
  		System.out.println(pagedSystemObjectNames);
  		if (!pagedSystemObjectNames.contains(pageable.toString())) {
  			if (pageable.getPageIntervalInMinutes() <= 0) {
  				System.out.println(new LogEntry(Level.VERBOSE, "scheduler will not page " + StringSupport.trim(pageable.toString() + "'", 80, "...") + ": interval in minutes (" + pageable.getPageIntervalInMinutes() + ") is not valid"));
  			} else {
  				System.out.println(new LogEntry(Level.VERBOSE, "scheduler will page " + StringSupport.trim(pageable.toString() + "'", 80, "...") + " every " + pageable.getPageIntervalInMinutes() + " minute(s)"));
  			}
  			synchronized (pagedSystems) {
  				pagedSystems.add(pageable);
  				pagedSystemObjectNames.add(pageable.toString());
  			}
  		} else {
  			System.out.println(new LogEntry("pageable " + pageable + " already registered in scheduler"));
  		}
  	}