code: func (r Metric_Tracking_Object) GetBandwidthData(startDateTime *datatypes.Time, endDateTime *datatypes.Time, typ *string, rollupSeconds *int) (resp []datatypes.Metric_Tracking_Object_Data, err error) {
  	params := []interface{}{
  		startDateTime,
  		endDateTime,
  		typ,
  		rollupSeconds,
  	}
  	err = r.Session.DoRequest("SoftLayer_Metric_Tracking_Object", "getBandwidthData", params, &r.Options, &resp)
  	return
  }
docs: // Retrieve a collection of raw bandwidth data from an individual public or private network tracking object. Raw data is ideal if you with to employ your own traffic storage and graphing systems.