src/vs/platform/workspaces/electron-main/workspacesHistoryMainService.ts/WorkspacesHistoryMainService/location
class WorkspacesHistoryMainService:	private location(recent: IRecent): URI {
		if (isRecentFolder(recent)) {
			return recent.folderUri;
		}

		if (isRecentFile(recent)) {
			return recent.fileUri;
		}

		return recent.workspace.configPath;
	}