src/vs/workbench/contrib/callHierarchy/browser/callHierarchyPeek.ts/LayoutInfo/retrieve
class LayoutInfo:	static retrieve(storageService: IStorageService): LayoutInfo {
		const value = storageService.get('callHierarchyPeekLayout', StorageScope.GLOBAL, '{}');
		const defaultInfo: LayoutInfo = { ratio: 0.7, height: 17 };
		try {
			return { ...defaultInfo, ...JSON.parse(value) };
		} catch {
			return defaultInfo;
		}
	}