docs: public @Nonnull Collection<FingerprintFacet> getSortedFacets() {
          List<FingerprintFacet> r = new ArrayList<>(getFacets());
          r.sort(new Comparator<FingerprintFacet>() {
              public int compare(FingerprintFacet o1, FingerprintFacet o2) {
                  long a = o1.getTimestamp();
                  long b = o2.getTimestamp();
                  if (a < b) return -1;
                  if (a == b) return 0;
                  return 1;
              }
          });
          return r;
      }