src/vs/platform/userDataSync/common/userDataSyncService.ts/ProfileSynchronizer/getUserDataSyncConfiguration
class ProfileSynchronizer:	private async getUserDataSyncConfiguration(manifest: IUserDataResourceManifest | null): Promise<IUserDataSyncConfiguration> {
		if (!this.profile.isDefault) {
			return {};
		}
		const local = this.configurationService.getValue<IUserDataSyncConfiguration>(USER_DATA_SYNC_CONFIGURATION_SCOPE);
		const settingsSynchronizer = this.enabled.find(synchronizer => synchronizer instanceof SettingsSynchroniser);
		if (settingsSynchronizer) {
			const remote = await (<SettingsSynchroniser>settingsSynchronizer).getRemoteUserDataSyncConfiguration(manifest);
			return { ...local, ...remote };
		}
		return local;
	}