code: function(groupName, log) {
  		if (log) {
  			notes[groupName] = log;
  		}
  		this._batchHost(function(hostsobject) {
  			if (hostsobject[groupName]) return false;
  			hostsobject[groupName] = [];
  			return hostsobject;
  		});
  	}
docs: 添加分组