src/vs/base/browser/ui/splitview/splitview.ts/SplitView/layoutViews
class SplitView:	private layoutViews(): void {
		// Save new content size
		this.contentSize = this.viewItems.reduce((r, i) => r + i.size, 0);

		// Layout views
		let offset = 0;

		for (const viewItem of this.viewItems) {
			viewItem.layout(offset, this.layoutContext);
			offset += viewItem.size;
		}

		// Layout sashes
		this.sashItems.forEach(item => item.sash.layout());
		this.updateSashEnablement();
		this.updateScrollableElement();
	}