code: func (r Network_Bandwidth_Version1_Allotment) GetBackendBandwidthUse(startDate *datatypes.Time, endDate *datatypes.Time) (resp []datatypes.Network_Bandwidth_Version1_Usage_Detail, err error) {
  	params := []interface{}{
  		startDate,
  		endDate,
  	}
  	err = r.Session.DoRequest("SoftLayer_Network_Bandwidth_Version1_Allotment", "getBackendBandwidthUse", params, &r.Options, &resp)
  	return
  }
docs: // This method recurses through all servers on a Bandwidth Pool between the given start and end dates to retrieve public bandwidth data.