src/vs/base/browser/ui/scrollbar/scrollableElement.ts/DomScrollableElement/constructor
class DomScrollableElement:	constructor(element: HTMLElement, options: ScrollableElementCreationOptions) {
		super(element, options);
		this._element = element;
		this.onScroll((e) => {
			if (e.scrollTopChanged) {
				this._element.scrollTop = e.scrollTop;
			}
			if (e.scrollLeftChanged) {
				this._element.scrollLeft = e.scrollLeft;
			}
		});
		this.scanDomNode();
	}