src/vs/workbench/browser/parts/editor/sideBySideEditor.ts/SideBySideEditor/recreateSplitview
class SideBySideEditor:	private recreateSplitview(): void {
		const container = assertIsDefined(this.getContainer());

		// Clear old (if any) but remember ratio
		const ratio = this.getSplitViewRatio();
		if (this.splitview) {
			container.removeChild(this.splitview.el);
			this.splitviewDisposables.clear();
		}

		// Create new
		this.createSplitView(container, ratio);

		this.layout(this.dimension);
	}