diff --git a/typescript/base/combination/expander.ts b/typescript/base/combination/expander.ts
index e874475a2..ac5c5101e 100644
--- a/typescript/base/combination/expander.ts
+++ b/typescript/base/combination/expander.ts
@@ -27,7 +27,7 @@ export declare class Expander extends Widget {
 
     hideView(): void;
 
-    getView(): any;
+    getView<T>(): T;
 
     getAllLeaves<T>(): T[];