@Override
  public synchronized @Nullable String getHint(@NotNull QuickFix fix) {
    if (myQuickFixes != null) {
      List<String> list = myQuickFixes.getKeysByValue(fix);
      if (list != null) {
        LOG.assertTrue(list.size() == 1);
        return list.get(0);
      }
    }
    return null;
  }
@Override
  public synchronized @Nullable String getHint(@NotNull QuickFix fix)