code: function (obj) {
      var res = _.assign(_.assign({}, this), obj);
      for (var f in this) {
        if (_.isFunction(this[f])) {
          res[f] = this[f];
        }
      }
      if (_.isFunction(res.checkConnection)) {
        res.checkConnection();
      }
      return res;
    }
docs: Use this function to extend this repository with the appropriate collectionName and perhaps other stuff.
  @param  {Object} obj The object that should be extended.
  @return {Object}     The extended object.