src/vs/base/browser/ui/scrollbar/scrollableElement.ts/ScrollableElement/constructor
class ScrollableElement:	constructor(element: HTMLElement, options: ScrollableElementCreationOptions) {
		options = options || {};
		options.mouseWheelSmoothScroll = false;
		const scrollable = new Scrollable({
			forceIntegerValues: true,
			smoothScrollDuration: 0,
			scheduleAtNextAnimationFrame: (callback) => dom.scheduleAtNextAnimationFrame(callback)
		});
		super(element, options, scrollable);
		this._register(scrollable);
	}