code: function (connection, options) {
  	options = options || {};
  	var includeKey = options.includeKey;
  	
  	return map(function (key, callback) {
  		connection.get(key, options, includeKey ? function (error, result) {
  			if (result != null)
  				result.key = key;
  			callback(error, result);
  		} : callback);
  	});
  }
docs: TODO: provide option to buffer get/set and use getMulti/setMulti