public static boolean isAncestor(@NotNull VirtualFile ancestor, @NotNull VirtualFile file, boolean strict) {
    if (!file.getFileSystem().equals(ancestor.getFileSystem())) return false;
    VirtualFile parent = strict ? file.getParent() : file;
    while (true) {
      if (parent == null) return false;
      if (parent.equals(ancestor)) return true;
      parent = parent.getParent();
    }
  }
public static boolean isAncestor(@NotNull VirtualFile ancestor, @NotNull VirtualFile file, boolean strict)