src/vs/workbench/contrib/welcome/walkThrough/browser/walkThroughPart.ts/WalkThroughPart/onTouchChange
class WalkThroughPart:	private onTouchChange(event: GestureEvent) {
		event.preventDefault();
		event.stopPropagation();

		const scrollPosition = this.scrollbar.getScrollPosition();
		this.scrollbar.setScrollPosition({ scrollTop: scrollPosition.scrollTop - event.translationY });
	}