private boolean process() {
      myProgressIndicator.setIndeterminate(true);
      List<VirtualFile> files = new ArrayList<>();
      updateIndicatorText(ApplicationBundle.message("bulk.reformat.prepare.progress.text"), "");
      boolean success = myCountingIterator.processAll(file -> {
        files.add(file.getVirtualFile());
        return !isDone();
      });
      if (!success) return false;
      myTotalFiles = files.size();
      myProgressIndicator.setIndeterminate(false);
      Application application = ApplicationManager.getApplication();
      if (!application.isUnitTestMode()) {
        application.invokeAndWait(() -> {
          ReadonlyStatusHandler.OperationStatus status = ReadonlyStatusHandler.getInstance(myProject).ensureFilesWritable(files);
          if (status.hasReadonlyFiles()) {
            stop();
          }
        });
        if (isDone()) return false;
      }

      return myFileTreeIterator.processAll(file -> {
        next = file;
        iteration();
        return !isDone();
      });
    }
private boolean process()