func FindPerformanceIOPSPrice(productPackage datatypes.Product_Package, size int, iops int) (datatypes.Product_Item_Price, error) {
	for _, item := range productPackage.Items {
		if int(*item.Capacity) != int(iops) {
			continue
		}
		for _, price := range item.Prices {
			// Only collect prices from valid location groups.
			if price.LocationGroupId != nil {
				continue
			}
			if !hasCategory(price.Categories, "performance_storage_iops") {
				continue
			}
			min, err := strconv.Atoi(*price.CapacityRestrictionMinimum)
			if err != nil {
				return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
			}
			if size < int(min) {
				continue
			}
			max, err := strconv.Atoi(*price.CapacityRestrictionMaximum)
			if err != nil {
				return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
			}
			if size > int(max) {
				continue
			}
			return price, nil
		}
	}
	return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
}
func FindPerformanceIOPSPrice(productPackage datatypes.Product_Package, size int, iops int) (datatypes.Product_Item_Price, error) {
	for _, item := range productPackage.Items {
		if int(*item.Capacity) != int(iops) {
			continue
		}
		for _, price := range item.Prices {
			// Only collect prices from valid location groups.
			if price.LocationGroupId != nil {
				continue
			}
			if !hasCategory(price.Categories, "performance_storage_iops") {
				continue
			}
			min, err := strconv.Atoi(*price.CapacityRestrictionMinimum)
			if err != nil {
				return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
			}
			if size < int(min) {
				continue
			}
			max, err := strconv.Atoi(*price.CapacityRestrictionMaximum)
			if err != nil {
				return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
			}
			if size > int(max) {
				continue
			}
			return price, nil
		}
	}
	return datatypes.Product_Item_Price{}, bosherr.Errorf("Unable to find price for %d iops for the given volume", iops)
}
// Find the price in the given package with the specified size and iops