private void printRoundInfo(boolean lastRound) {
            if (printRounds || verbose) {
                List<ClassSymbol> tlc = lastRound ? List.<ClassSymbol>nil() : topLevelClasses;
                Set<TypeElement> ap = lastRound ? Collections.<TypeElement>emptySet() : annotationsPresent;
                log.printNoteLines("x.print.rounds",
                        number,
                        "{" + tlc.toString(", ") + "}",
                        ap,
                        lastRound);
            }
        }