@ApiStatus.Internal
  public final boolean mayContain(@Nullable Object object) {
    if (object == null) return false;
    VirtualFile ancestor = extractFileFromValue();
    if (ancestor == null) return true; // always search in unknown nodes
    if (!ancestor.isValid()) return false; // do not search in invalid files
    if (object instanceof PsiElement) {
      object = PsiUtilCore.getVirtualFile((PsiElement)object);
    }
    if (object instanceof VirtualFile file) {
      if (!file.isValid()) return false; // do not search for invalid files
      return VfsUtilCore.isAncestor(ancestor, file, false);
    }
    return true; // any custom object can be contained somewhere in a tree
  }
@ApiStatus.Internal
  public final boolean mayContain(@Nullable Object object)