src/vs/platform/userDataSync/common/abstractSynchronizer.ts/AbstractSynchroniser/getLocalSyncResourceHandles
class AbstractSynchroniser:	async getLocalSyncResourceHandles(): Promise<ISyncResourceHandle[]> {
		const handles = await this.userDataSyncBackupStoreService.getAllRefs(this.resource);
		return handles.map(({ created, ref }) => ({ created, uri: this.toLocalBackupResource(ref) }));
	}