private void removeIdFromChildren(@NotNull VirtualFile parent, int parentId, int childId) {
    ChildInfo toRemove = new ChildInfoImpl(childId, ChildInfoImpl.UNKNOWN_ID_YET, null, null, null);
    vfsPeer.update(parent, parentId, list -> list.remove(toRemove));
  }
private void removeIdFromChildren(@NotNull VirtualFile parent, int parentId, int childId)