From a56a22fe0cb19d60ef734fb6a0fcfe2dc64e7555 Mon Sep 17 00:00:00 2001
From: Jonathan Olson <jonathan.olson@colorado.edu>
Date: Tue, 7 Dec 2021 18:32:04 -0700
Subject: [PATCH] Converting DerivedProperty/Multilink to properly
 parameterized TypeScript, and usage of IReadOnlyProperty. See
 https://github.com/phetsims/axon/issues/371

---
 js/game/model/Subitizer.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/js/game/model/Subitizer.ts b/js/game/model/Subitizer.ts
index 862f9141..cd9c3b58 100644
--- a/js/game/model/Subitizer.ts
+++ b/js/game/model/Subitizer.ts
@@ -16,6 +16,7 @@
 
 import BooleanProperty from '../../../../axon/js/BooleanProperty.js';
 import DerivedProperty from '../../../../axon/js/DerivedProperty.js';
+import IReadOnlyProperty from '../../../../axon/js/IReadOnlyProperty.js';
 import NumberProperty from '../../../../axon/js/NumberProperty.js';
 import Property from '../../../../axon/js/Property.js';
 import Bounds2 from '../../../../dot/js/Bounds2.js';
@@ -119,7 +120,7 @@ class Subitizer {
   private timeSinceShapeVisible: number;
   public readonly objectSize: number;
   public readonly inputEnabledProperty: BooleanProperty;
-  private timeToShowShapeProperty: DerivedProperty<number>;
+  private timeToShowShapeProperty: IReadOnlyProperty<number>;
   public objectTypeProperty: Property<SubitizeObjectTypeEnum>;
   public isDelayStarted: boolean;
   private timeSinceDelayStarted: number;