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src/vs/base/browser/ui/selectBox/selectBox.ts

@@ -22,9 +22,9 @@ export interface ISelectBoxDelegate {
 
 	// Public SelectBox Interface
 	readonly onDidSelect: Event<ISelectData>;
-	setOptions(options: ISelectOptionItem[], selected?: number);
+	setOptions(options: ISelectOptionItem[], selected?: number): void;
 	select(index: number): void;
-	setAriaLabel(label: string);
+	setAriaLabel(label: string): void;
 	focus(): void;
 	blur(): void;
 	dispose(): void;

src/vs/base/browser/ui/splitview/splitview.ts

@@ -226,7 +226,7 @@ export class SplitView extends Disposable {
 		// Add sash
 		if (this.viewItems.length > 1) {
 			const orientation = this.orientation === Orientation.VERTICAL ? Orientation.HORIZONTAL : Orientation.VERTICAL;
-			const layoutProvider = this.orientation === Orientation.VERTICAL ? { getHorizontalSashTop: sash => this.getSashPosition(sash) } : { getVerticalSashLeft: sash => this.getSashPosition(sash) };
+			const layoutProvider = this.orientation === Orientation.VERTICAL ? { getHorizontalSashTop: (sash: Sash) => this.getSashPosition(sash) } : { getVerticalSashLeft: (sash: Sash) => this.getSashPosition(sash) };
 			const sash = new Sash(this.sashContainer, layoutProvider, {
 				orientation,
 				orthogonalStartSash: this.orthogonalStartSash,