src/vs/base/browser/ui/scrollbar/scrollbarArrow.ts/ScrollbarArrow/_arrowMouseDown
class ScrollbarArrow:	private _arrowMouseDown(e: IMouseEvent): void {
		const scheduleRepeater = () => {
			this._mousedownRepeatTimer.cancelAndSet(() => this._onActivate(), 1000 / 24);
		};

		this._onActivate();
		this._mousedownRepeatTimer.cancel();
		this._mousedownScheduleRepeatTimer.cancelAndSet(scheduleRepeater, 200);

		this._mouseMoveMonitor.startMonitoring(
			e.target,
			e.buttons,
			standardMouseMoveMerger,
			(mouseMoveData: IStandardMouseMoveEventData) => {
				/* Intentional empty */
			},
			() => {
				this._mousedownRepeatTimer.cancel();
				this._mousedownScheduleRepeatTimer.cancel();
			}
		);

		e.preventDefault();
	}