wip: preliminary potential fix for dispatcher

Author: MikeDobrzan

src/Api/PubnubApi/EventEngine/Core/EffectDispatcher.cs

@@ -13,7 +13,7 @@ public class EffectDispatcher {
 		/// <summary>
 		/// Dispatch an invocation i.e. call a registered effect handler.
 		/// </summary>
-		public async Task Dispatch<T>(T invocation) where T : IEffectInvocation {
+		public async Task Dispatch(IEffectInvocation invocation) {
 			if (!effectInvocationHandlerMap.ContainsKey(invocation.GetType())) {
 				throw new ArgumentException($"No handler for {invocation.GetType().Name} found.");
 			}
@@ -24,7 +24,7 @@ public async Task Dispatch<T>(T invocation) where T : IEffectInvocation {
 				await effectInvocationHandlerMap[invocation.GetType()].Cancel();
 			} else
 			{
-				var handler = ((IEffectHandler<T>)effectInvocationHandlerMap[invocation.GetType()]);
+				var handler = effectInvocationHandlerMap[invocation.GetType()];
 				if (handler.IsBackground(invocation))
 					handler.Run(invocation).Start();
 				else

src/Api/PubnubApi/EventEngine/Core/Utils.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Collections.Generic;
+using System.Reflection;
 
 namespace PubnubApi.EventEngine.Core
 {
@@ -17,6 +18,20 @@ internal static IEffectInvocation[] AsArray(this IEffectInvocation invocation)
         {
             return new IEffectInvocation[] { invocation };
         }
+
+        internal static bool IsBackground(this IEffectHandler handler, IEffectInvocation invocation)
+        {
+            return (bool)handler.GetType()
+                .GetMethod("IsBackground")
+                .Invoke(handler, new object[] { invocation });
+        }
+        
+        internal static Task Run(this IEffectHandler handler, IEffectInvocation invocation)
+        {
+            return (Task)handler.GetType()
+                .GetMethod("Run")
+                .Invoke(handler, new object[] { invocation });
+        }
     }
 
     public class TransitionResult