@NotNull
  @Deprecated
  public <S> List<S> filterUniqueRoots(@NotNull List<S> in, @NotNull Function<? super S, ? extends VirtualFile> convertor) {
    if (!allowsNestedRoots()) {
      new FilterDescendantVirtualFileConvertible<>(convertor, FilePathComparator.getInstance()).doFilter(in);
    }
    return in;
  }
@NotNull
  @Deprecated
  public <S> List<S> filterUniqueRoots(@NotNull List<S> in, @NotNull Function<? super S, ? extends VirtualFile> convertor)