code: private boolean registerAndConfirmIfImIt() throws ClusterInfoException {
          // reset the subdir watcher
          final Collection<String> imItSubdirs = utils.persistentGetSubdir(utils.leaderDir, this);
  
          // "there can be only one"
          if (imItSubdirs.size() > 1)
              throw new ClusterInfoException(
                      "This is IMPOSSIBLE. There's more than one subdir of " + utils.leaderDir + ". They include " + imItSubdirs);
  
          // make sure it's still mine.
          @SuppressWarnings("unchecked")
          final C registered = (C) session.getData(utils.masterDetermineDir, null);
  
          return utils.thisNodeAddress.equals(registered); // am I it, or not?
      }
docs: whether or not imIt and return that.