src/vs/workbench/services/userDataSync/browser/userDataSyncWorkbenchService.ts/UserDataSyncWorkbenchService/currentSessionId
class UserDataSyncWorkbenchService:	private set currentSessionId(cachedSessionId: string | undefined) {
		if (this._cachedCurrentSessionId !== cachedSessionId) {
			this._cachedCurrentSessionId = cachedSessionId;
			if (cachedSessionId === undefined) {
				this.storageService.remove(UserDataSyncWorkbenchService.CACHED_SESSION_STORAGE_KEY, StorageScope.GLOBAL);
			} else {
				this.storageService.store(UserDataSyncWorkbenchService.CACHED_SESSION_STORAGE_KEY, cachedSessionId, StorageScope.GLOBAL, StorageTarget.MACHINE);
			}
		}
	}