src/vs/platform/userDataSync/common/abstractSynchronizer.ts/AbstractInitializer/constructor
class AbstractInitializer:	constructor(
		readonly resource: SyncResource,
		@IEnvironmentService protected readonly environmentService: IEnvironmentService,
		@ILogService protected readonly logService: ILogService,
		@IFileService protected readonly fileService: IFileService,
		@IUriIdentityService uriIdentityService: IUriIdentityService,
	) {
		this.extUri = uriIdentityService.extUri;
		this.lastSyncResource = getLastSyncResourceUri(this.resource, environmentService, this.extUri);
	}