code: function(type, key, flag) {
  			key = "" + key; // #90
  			var local = this._local,
  				instOpts = this.options.persist,
  				delim = instOpts.cookieDelimiter,
  				cookieName = local.cookiePrefix + type,
  				data = local._data(cookieName),
  				keyList = data ? data.split(delim) : [],
  				idx = $.inArray(key, keyList);
  			// Remove, even if we add a key,  so the key is always the last entry
  			if (idx >= 0) {
  				keyList.splice(idx, 1);
  			}
  			// Append key to cookie
  			if (flag) {
  				keyList.push(key);
  			}
  			local._data(cookieName, keyList.join(delim));
  		}
docs: /* Append `key` to a cookie.