// most recently updated DynamicRouteConfig
func (w *Wrapper) GetLastUpdatedDynamicRouteTime() (*time.Time, error) {
	routeDump, err := w.GetRouteConfigDump()
	if err != nil {
		return nil, err
	}
	drc := routeDump.GetDynamicRouteConfigs()

	lastUpdated := time.Unix(0, 0) // get the oldest possible timestamp
	for i := range drc {
		if drc[i].LastUpdated != nil {
			drLastUpdated := drc[i].LastUpdated.AsTime()