src/vs/workbench/contrib/remoteTunnel/electron-sandbox/remoteTunnel.contribution.ts/RemoteTunnelWorkbenchContribution/existingSessionId
class RemoteTunnelWorkbenchContribution:	private set existingSessionId(sessionId: string | undefined) {
		this.logger.trace(`Saving authentication preference for ID ${sessionId}.`);
		if (sessionId === undefined) {
			this.storageService.remove(SESSION_ID_STORAGE_KEY, StorageScope.APPLICATION);
		} else {
			this.storageService.store(SESSION_ID_STORAGE_KEY, sessionId, StorageScope.APPLICATION, StorageTarget.MACHINE);
		}
	}