@Override
  public @NotNull CharSequence getNameSequence() {
    PersistentFSImpl pfs = (PersistentFSImpl)ManagingFS.getInstanceOrNull();
    if (pfs == null) {
      return "<FS-is-disposed>";//shutdown-safe
    }
    return pfs.getName(myId);
  }
@Override
  public @NotNull CharSequence getNameSequence()