code: function Formatter(format, timeFormat) {
  	format = format || '%(message)';
  	timeFormat = timeFormat || '%Y-%m-%d %H:%M:%S';
  
  	/**
  	 * @private
  	 * @type {string}
  	 */
  	this._format = format;
  
  	/**
  	 * @private
  	 * @type {string}
  	 */
  	this._timeFormat = timeFormat;
  }
docs: Default formatter.
  
  @constructor Formatter
  @param {string} [format]
  @param {string} [timeFormat]