I beleive its ready now.

PoweredSoft.DynamicQuery.Test/ConvertibleInterceptorTests.cs

@@ -55,6 +55,22 @@ namespace PoweredSoft.DynamicQuery.Test
             }
         }
 
+        private class MockQueryConvertGenericInterceptor2 :
+            IQueryConvertInterceptor<Customer, CustomerModel>
+        {
+            public CustomerModel InterceptResultTo(Customer entity)
+            {
+                var customer = entity;
+                var personModel = new CustomerModel
+                {
+                    Id = customer.Id,
+                    FirstName = customer.FirstName,
+                    LastName = customer.LastName
+                };
+                return personModel;
+            }
+        }
+
         [Fact]
         public void NonGeneric()
         {
@@ -80,5 +96,18 @@ namespace PoweredSoft.DynamicQuery.Test
                 Assert.All(result.Data, t => Assert.IsType<CustomerModel>(t));
             });
         }
+
+        [Fact]
+        public void Generic2()
+        {
+            MockContextFactory.SeedAndTestContextFor("ConvertibleIntereceptorTests_Generic2", TestSeeders.SimpleSeedScenario, ctx =>
+            {
+                var criteria = new QueryCriteria();
+                var queryHandler = new QueryHandler();
+                queryHandler.AddInterceptor(new MockQueryConvertGenericInterceptor2());
+                var result = queryHandler.Execute<Customer, CustomerModel>(ctx.Customers, criteria);
+                Assert.All(result.Data, t => Assert.IsType<CustomerModel>(t));
+            });
+        }
     }
 }

PoweredSoft.DynamicQuery/QueryResult.cs

@@ -25,6 +25,8 @@ namespace PoweredSoft.DynamicQuery
         public List<TRecord> Data { get; set; }
 
         public bool ShouldSerializeAggregates() => Aggregates != null;
+
+        public bool ShouldSerializeData() => Data != null;
     }
 
     // just result
@@ -44,7 +46,9 @@ namespace PoweredSoft.DynamicQuery
     {
         public string GroupPath { get; set; }
         public object GroupValue { get; set; }
-        public bool HasSubGroups { get; set; }
+        public bool HasSubGroups => SubGroups != null && SubGroups.Count > 1;
         public List<IGroupQueryResult<TRecord>> SubGroups { get; set; }
+
+        public bool ShouldSerializeSubGroups() => HasSubGroups;
     }
 }

PoweredSoft.DynamicQuery/ServiceCollectionExtensions.cs

@@ -18,7 +18,7 @@ namespace PoweredSoft.DynamicQuery
             services.TryAddTransient<IGroup, Group>();
             services.TryAddTransient<IQueryCriteria, QueryCriteria>();
             services.TryAddTransient<IQueryHandler, QueryHandler>();
-            //services.TryAddTransient<IQueryHandlerAsync, QueryHandlerAsync>();
+            services.TryAddTransient<IQueryHandlerAsync, QueryHandlerAsync>();
             return services;
         }
     }

README.md

@@ -219,4 +219,4 @@ Interceptor                       | Interface
 ----------------------------------|---------------------------------------------------------------------------------------|-------------------------------------------------------------|------------------------------------------------------------------------------------------------
 IQueryConvertInterceptor          | [interface](../master/PoweredSoft.DynamicQuery.Core/IQueryConvertInterceptor.cs) | [test](../master/PoweredSoft.DynamicQuery.Test/ConvertibleInterceptorTests.cs) | This interceptor allows you to replace the object that is being returned by the query, by another object instance
 IQueryConvertInterceptor<T, T2> | [interface](../master/PoweredSoft.DynamicQuery.Core/IQueryConvertInterceptor.cs) | [test](../master/PoweredSoft.DynamicQuery.Test/ConvertibleInterceptorTests.cs#L72) | This interceptor allows you to replace the object that is being returned by the query, by another object instance **(restricts the source)**
-IQueryConvertInterceptor<T, T2> | coming soon | coming soon | This interceptor allows you to replace the object that is being returned by the query, by another object instance **(restricts the source & output)**
+IQueryConvertInterceptor<T, T2> | [interface](../master/PoweredSoft.DynamicQuery.Core/IQueryConvertInterceptor.cs) | [test](../master/PoweredSoft.DynamicQuery.Test/ConvertibleInterceptorTests.cs#L101) | This interceptor allows you to replace the object that is being returned by the query, by another object instance **(restricts the source & output)**