code: synchronized protected void onResolveCloudAnchor(String anchorId, CloudAnchorCallback cb) {
          Anchor newAnchor = mSession.resolveCloudAnchor(anchorId);
          pendingAnchors.put(newAnchor, cb);
      }
docs: This method resolves an anchor. The {@link IAnchorEvents} will be invoked when the results are
  available.