src/vs/base/browser/ui/grid/gridview.ts/GridView/trySet2x2
class GridView:	trySet2x2(): void {
		this.disposable2x2.dispose();
		this.disposable2x2 = Disposable.None;

		if (this.root.children.length !== 2) {
			return;
		}

		const [first, second] = this.root.children;

		if (!(first instanceof BranchNode) || !(second instanceof BranchNode)) {
			return;
		}

		this.disposable2x2 = first.trySet2x2(second);
	}