code: function _initStorage(options) {
          var self = this;
          var dbInfo = {};
          if (options) {
              for (var i in options) {
                  dbInfo[i] = options[i];
              }
          }
  
          dbInfo.keyPrefix = dbInfo.name + '/';
  
          self._dbInfo = dbInfo;
          return Promise.resolve();
      }
docs: Config the localStorage backend, using options set in the config.