code: func (r Network_Application_Delivery_Controller) GetBandwidthImageByDate(startDateTime *datatypes.Time, endDateTime *datatypes.Time, networkType *string) (resp datatypes.Container_Bandwidth_GraphOutputs, err error) {
  	params := []interface{}{
  		startDateTime,
  		endDateTime,
  		networkType,
  	}
  	err = r.Session.DoRequest("SoftLayer_Network_Application_Delivery_Controller", "getBandwidthImageByDate", params, &r.Options, &resp)
  	return
  }
docs: // Use this method when needing a bandwidth image for a single application delivery controller. It will gather the correct input parameters for the generic graphing utility based on the date ranges