src/vs/base/common/scrollable.ts/Scrollable/constructor
class Scrollable:	constructor(options: IScrollableOptions) {
		super();

		this._smoothScrollDuration = options.smoothScrollDuration;
		this._scheduleAtNextAnimationFrame = options.scheduleAtNextAnimationFrame;
		this._state = new ScrollState(options.forceIntegerValues, 0, 0, 0, 0, 0, 0);
		this._smoothScrolling = null;
	}