src/vs/base/browser/ui/scrollbar/abstractScrollbar.ts/AbstractScrollbar/updateScrollbarSize
class AbstractScrollbar:	public updateScrollbarSize(scrollbarSize: number): void {
		this._updateScrollbarSize(scrollbarSize);
		this._scrollbarState.setScrollbarSize(scrollbarSize);
		this._shouldRender = true;
		if (!this._lazyRender) {
			this.render();
		}
	}