diff --git a/typescript/base/single/iframe/iframe.ts b/typescript/base/single/iframe/iframe.ts
index 86d80ca9dd..2873ac4afc 100644
--- a/typescript/base/single/iframe/iframe.ts
+++ b/typescript/base/single/iframe/iframe.ts
@@ -1,11 +1,11 @@
 import { _Single } from "../single";
 
 export interface _Iframe extends _Single {
-    setSrc: (v: string) => void;
+    setSrc(v: string): void;
 
-    getSrc: () => string;
+    getSrc(): string;
 
-    setName: (v: string) => void;
+    setNam(v: string): void;
 
-    getName: () => string;
+    getName(): string;
 }
diff --git a/typescript/core/wrapper/layout/layout.absolute.ts b/typescript/core/wrapper/layout/layout.absolute.ts
index 04f625750d..d848647cbd 100644
--- a/typescript/core/wrapper/layout/layout.absolute.ts
+++ b/typescript/core/wrapper/layout/layout.absolute.ts
@@ -1,9 +1,9 @@
 import { _Layout } from "../layout";
 
 export interface _AbsoluteLayout extends _Layout {
-    resize: () => void;
+    resize(): void;
 
-    stroke: <T>(items: T[]) => void;
+    stroke<T>(items: T[]): void;
 
-    populate: <T>(items?: T[]) => void;
+    populate<T>(items?: T[]): void;
 }
diff --git a/typescript/core/wrapper/layout/layout.vertical.ts b/typescript/core/wrapper/layout/layout.vertical.ts
index e5df719339..6fe104181b 100644
--- a/typescript/core/wrapper/layout/layout.vertical.ts
+++ b/typescript/core/wrapper/layout/layout.vertical.ts
@@ -1,7 +1,7 @@
 import { _Layout } from "../layout";
 
 export interface _VerticalLayout extends _Layout {
-    resize: () => void;
+    resize(): void;
 
-    populate: <T>(items?: T[]) => void;
+    populate<T>(items?: T[]): void;
 }