@NotNull
    public List<String> generateReportHeader() {
      List<String> lines = new ArrayList<>();
      lines.add("       use AppCDS: " + useAppCDS);
      lines.add("    Total classes: " + myClasses.size());
      lines.add("   system classes: " + myClasses.values().stream().filter(info -> info.source == null).count());
      lines.add("  pre 1.6 classes: " + myClasses.values().stream().filter(info -> info.myTooOldClassVersion != null).count());
      lines.add("  ignored classes: " + myClasses.values().stream().filter(info -> !isValid(info)).count());
      lines.add("");
      return lines;
    }
@NotNull
    public List<String> generateReportHeader()