From 3a80cee3fc869cddf66625d89459fb83d966bbad Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Mon, 20 Jan 2020 11:02:28 +0100
Subject: [PATCH] Add nullability annotations.

---
 src/Avalonia.Base/Reactive/BindingValueExtensions.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Base/Reactive/BindingValueExtensions.cs b/src/Avalonia.Base/Reactive/BindingValueExtensions.cs
index 6871602ad9..6f0d29dd0f 100644
--- a/src/Avalonia.Base/Reactive/BindingValueExtensions.cs
+++ b/src/Avalonia.Base/Reactive/BindingValueExtensions.cs
@@ -20,13 +20,13 @@ namespace Avalonia.Reactive
             return new BindingValueSubjectAdapter<T>(source);
         }
 
-        public static IObservable<object> ToUntyped<T>(this IObservable<BindingValue<T>> source)
+        public static IObservable<object?> ToUntyped<T>(this IObservable<BindingValue<T>> source)
         {
             source = source ?? throw new ArgumentNullException(nameof(source));
             return new UntypedBindingAdapter<T>(source);
         }
 
-        public static ISubject<object> ToUntyped<T>(this ISubject<BindingValue<T>> source)
+        public static ISubject<object?> ToUntyped<T>(this ISubject<BindingValue<T>> source)
         {
             source = source ?? throw new ArgumentNullException(nameof(source));
             return new UntypedBindingSubjectAdapter<T>(source);