src/vs/base/browser/ui/scrollbar/scrollbarState.ts/ScrollbarState/setScrollSize
class ScrollbarState:	public setScrollSize(scrollSize: number): boolean {
		const iScrollSize = Math.round(scrollSize);
		if (this._scrollSize !== iScrollSize) {
			this._scrollSize = iScrollSize;
			this._refreshComputedValues();
			return true;
		}
		return false;
	}