private void checkHiddenAttributeChange(List<VFileEvent> events, VirtualFile child, boolean oldHidden, boolean newHidden) {
    if (oldHidden != newHidden) {
      scheduleAttributeChange(events, child, VirtualFile.PROP_HIDDEN, oldHidden, newHidden);
    }
  }
private void checkHiddenAttributeChange(List<VFileEvent> events, VirtualFile child, boolean oldHidden, boolean newHidden)