src/vs/platform/userDataSync/common/extensionsStorageSync.ts/ExtensionsStorageSyncService/setKeysForSync
class ExtensionsStorageSyncService:	setKeysForSync(extensionIdWithVersion: IExtensionIdWithVersion, keys: string[]): void {
		this.storageService.store(ExtensionsStorageSyncService.toKey(extensionIdWithVersion), JSON.stringify(keys), StorageScope.GLOBAL, StorageTarget.MACHINE);
	}