code: func (r Monitoring_Agent) GetGraphData(metricDataTypes []datatypes.Container_Metric_Data_Type, startDate *datatypes.Time, endDate *datatypes.Time) (resp []datatypes.Metric_Tracking_Object_Data, err error) {
  	params := []interface{}{
  		metricDataTypes,
  		startDate,
  		endDate,
  	}
  	err = r.Session.DoRequest("SoftLayer_Monitoring_Agent", "getGraphData", params, &r.Options, &resp)
  	return
  }
docs: // This method returns the metric data for each of the configuration values provided during the given time range.