diff --git a/typescript/core/base.ts b/typescript/core/base.ts
index 40a216d76..e8793810c 100644
--- a/typescript/core/base.ts
+++ b/typescript/core/base.ts
@@ -263,7 +263,7 @@ export interface _base {
 
     isDeepMatch: (object: any, attrs: any) => boolean;
 
-    contains: (obj: any[], target: any, fromIndex?: number) => number;
+    contains: (obj: any[], target: any, fromIndex?: number) => boolean;
 
     deepContains: (obj: any[], copy: any) => number;
 
diff --git a/typescript/core/plugin.ts b/typescript/core/plugin.ts
index cbd1da1d9..83c1176fb 100644
--- a/typescript/core/plugin.ts
+++ b/typescript/core/plugin.ts
@@ -1,13 +1,13 @@
-import {_Widget} from "./widget";
+import { _Widget } from "./widget";
 
-type configWidgetFn = (options: object) =>  object
-type configObjectFn = (widget: _Widget) => void
+type configWidgetFn = (type: string, options: Obj) => void
+type configObjectFn = (type: string, widget: _Widget) => void
 
-export  type _config = (widgetFunction: configWidgetFn | configWidgetFn[], objectFunction: configObjectFn | configObjectFn[]) => void
+export type _config = (widgetFunction: configWidgetFn | configWidgetFn[], objectFunction: configObjectFn | configObjectFn[]) => void
 
-export  type _configWidget = (shorcut: string, widgetFunction: configWidgetFn) => void
+export type _configWidget = (shortcut: string, widgetFunction: configWidgetFn) => void
 
-export  type _registerObject = (shorcut: string, objectFunction: configObjectFn) => void
+export type _registerObject = (shortcut: string, objectFunction: configObjectFn) => void
 
 export type _Plugin = {
     config: _config;