code: public void becomeCloneOf(ManagedObject other)
      {
          Anchor o = (Anchor)other;
          _rootStreamToken = o._rootStreamToken;
          _uniqueKeyTableToken = o._uniqueKeyTableToken;
      }
docs: Replace the state of this object with the same object in some other state.
  Used for to restore the before image if a transaction rolls back.
  
  @param other  The object this object is to become a clone of.