diff --git a/packages/example/src/routes/tests.tsx b/packages/example/src/routes/tests.tsx
index 8d077ce..a248009 100644
--- a/packages/example/src/routes/tests.tsx
+++ b/packages/example/src/routes/tests.tsx
@@ -6,6 +6,13 @@ import { Console, Effect, Option } from "effect"
 import { useEffect, useState } from "react"
 
 
+interface Node {
+    readonly value: string
+    readonly left?: Node
+    readonly right?: Node
+}
+
+
 const makeUuid = Effect.provide(makeUuid4, GetRandomValues.CryptoRandom)
 
 
@@ -32,6 +39,11 @@ function RouteComponent() {
         runSync,
     ), [scopeLayer, runSync])
 
+
+    const nodeRef = R.useRef(() => Effect.succeed<Node>({ value: "prout" }))
+    const nodeValueRef = R.useSubRefFromPath(nodeRef, ["value"])
+
+
     return (
         <Flex direction="column" justify="center" align="center" gap="2">
             <Text>{uuid}</Text>