private final ConcurrentMap<BuilderProblem.Severity, LongAdder> counters;
        private final ConcurrentMap<BuilderProblem.Severity, List<P>> problems;
        private final Predicate<? super P> filter;

        private static final List<BuilderProblem.Severity> REVERSED_ORDER = Arrays.stream(
                        BuilderProblem.Severity.values())
                .sorted(Comparator.reverseOrder())