Refactor how the UN is got.

Author: yo1995

Shared/Samples/Display content of utility network container/DisplayContentOfUtilityNetworkContainerView.Model.swift

@@ -55,14 +55,16 @@ extension DisplayContentOfUtilityNetworkContainerView {
         }()
 
         /// The utility network for this sample.
-        private var network: UtilityNetwork!
+        private var network: UtilityNetwork {
+            map.utilityNetworks.first!
+        }
 
         // MARK: Methods
 
         /// Loads the utility network.
         func loadUtilityNetwork() async throws {
             // Gets and loads the first utility network from the web map.
-            network = map.utilityNetworks.first!
+            try await map.load()
             try await network.load()
         }
 

Shared/Samples/Display content of utility network container/DisplayContentOfUtilityNetworkContainerView.swift

@@ -84,7 +84,6 @@ struct DisplayContentOfUtilityNetworkContainerView: View {
                 .task {
                     // Loads the utility network from the web map.
                     do {
-                        try await model.map.load()
                         try await model.loadUtilityNetwork()
                         model.statusMessage = "Tap on a container to see its content."
                     } catch {