get button to work

src/browser/services/Services.ts

@@ -9,6 +9,7 @@ import { IColorSet } from 'browser/Types';
 import { ISelectionRedrawRequestEvent as ISelectionRequestRedrawEvent, ISelectionRequestScrollLinesEvent } from 'browser/selection/Types';
 import { createDecorator } from 'common/services/ServiceRegistry';
 import { IDisposable } from 'common/Types';
+import { IDecoration, IDecorationOptions } from 'xterm';
 
 export const ICharSizeService = createDecorator<ICharSizeService>('CharSizeService');
 export interface ICharSizeService {
@@ -51,7 +52,7 @@ export interface IRenderService extends IDisposable {
   onRefreshRequest: IEvent<{ start: number, end: number }>;
 
   dimensions: IRenderDimensions;
-
+  registerDecoration(decorationOptions: IDecorationOptions): IDecoration;
   refreshRows(start: number, end: number): void;
   clearTextureAtlas(): void;
   resize(cols: number, rows: number): void;