@Contract("null -> null; !null -> !null")
  @Override
  protected @Nullable Path fromDelegatePath(@Nullable Path path) {
    if (path instanceof MultiRoutingFsPath) {
      // `MultiRoutingFsPath` is encapsulated and can't be created outside this package.
      // Tricks with classloaders are not expected here.
      return ((MultiRoutingFsPath)path).getDelegate();
    }
    else {
      return path;
    }
  }
@Contract("null -> null; !null -> !null")
  @Override
  protected @Nullable Path fromDelegatePath(@Nullable Path path)