public void moveChildren(int fromParentId, int toParentId) {
    if (fromParentId == -1) return;
    if (fromParentId == FSRecords.NULL_FILE_ID) {
      throw new AssertionError("Move(" + fromParentId + " -> " + toParentId + "): can't move root to become non-root");
    }

    vfsPeer.moveChildren(fromParentId, toParentId);
  }
public void moveChildren(int fromParentId, int toParentId)