text: import Prelude
  
  extension ShippingRulesEnvelope {
    public enum lens {
      public static let shippingRules = Lens<ShippingRulesEnvelope, [ShippingRule]>(
        view: { $0.shippingRules },
        set: { shippingRules, _ in .init(shippingRules: shippingRules) }
      )
    }
  }
  