Fix an issue in which the GKMatchmakerViewController was unable to be displayed due to the default contstructor for Apple.GameKit.Multiplayer.GKMatchRequest being stripped. (Unity's code stripping functionality will occasionally miss implicit instantiations of constructors). (apple#41)

This is due to the default constructor for Apple.GameKit.Multiplayer.GKMatchRequest being stripped. (Unity's code stripping functionality will occasionally miss implicit instantiations of constructors and consider the code uncalled).

Author: jared-marsau

plug-ins/Apple.GameKit/Apple.GameKit_Unity/Assets/Apple.GameKit/Source/Multiplayer/GKMatchRequest.cs

@@ -3,6 +3,7 @@
 using AOT;
 using Apple.Core;
 using Apple.Core.Runtime;
+using UnityEngine.Scripting;
 
 namespace Apple.GameKit.Multiplayer
 {
@@ -65,6 +66,7 @@ public enum GKMatchType : ulong
 
         private static readonly InteropWeakMap<GKMatchRequest> _instanceMap = new InteropWeakMap<GKMatchRequest>();
 
+        [Preserve]
         internal GKMatchRequest(IntPtr pointer) : base(pointer)
         {
             _instanceMap.Add(this);