fix: implementation

ios/SingBoxPacketTunnel/SingBox/ExtensionPlatformInterface.swift

@@ -222,6 +222,10 @@ public class ExtensionPlatformInterface: NSObject, LibboxPlatformInterfaceProtoc
         }
     }
 
+    public func postServiceClose() async {
+        // TODO
+    }
+    
     func reset() {
         networkSettings = nil
     }

ios/SingBoxPacketTunnel/SingBox/ExtensionProvider.swift

@@ -137,9 +137,7 @@ open class ExtensionProvider: NEPacketTunnelProvider {
         stopService()
         await startService()
     }
-    func postServiceClose() async {
-        // TODO
-    }
+    
 
     override open func stopTunnel(with reason: NEProviderStopReason) async {
         writeMessage("(packet-tunnel) stopping, reason: \(reason)")