src/vs/base/common/scrollable.ts/Scrollable/setScrollPositionNow
class Scrollable:	public setScrollPositionNow(update: INewScrollPosition): void {
		// no smooth scrolling requested
		const newState = this._state.withScrollPosition(update);

		// Terminate any outstanding smooth scrolling
		if (this._smoothScrolling) {
			this._smoothScrolling.dispose();
			this._smoothScrolling = null;
		}

		this._setState(newState, false);
	}