docs: function microTimestamp () {
      // get time in seconds and microseconds
      var time = microtime.nowStruct()
      // zero pad micro seconds
      var micro = ('000000' + time[1]).slice(-6)
      // create mysql format timestamp from seconds and append micro seconds
      return moment.unix(time[0]).format('YYYY-MM-DD HH:mm:ss') + '.' + micro
  }