src/vs/workbench/services/userDataProfile/browser/userDataProfileImportExportService.ts/UserDataProfileImportExportState/getRoots
class UserDataProfileImportExportState:	getRoots(): Promise<IProfileResourceTreeItem[]> {
		if (!this.rootsPromise) {
			this.rootsPromise = (async () => {
				this.roots = await this.fetchRoots();
				return this.roots;
			})();
		}
		return this.rootsPromise;
	}