code: function findProtectedNode(builder, path, callback) {
    var zk = builder.client.zk;
    var pathAndNode = utils.pathAndNode(path);
    zk.getChildren(pathAndNode.path, afterCheck);
  
    function afterCheck(err, children) {
      if (err && err.getCode() === Exception.NO_NODE) {
        callback();
      }
      else if (err) {
        callback(err);
      }
      else if (children.length) {
        var result = findNode(children, pathAndNode.path, builder.protectedId);
        callback(null, result);
      }
      else {
        callback();
      }
    }
  }
docs: Try to find protected node with same `protectedId`.
  
  @param {CreateBuilder} builder Builder instance
  @param {String} path Desired path
  @param {Function} callback Callback function: <code>(err, nodePath)</code>