src/vs/platform/userDataSync/common/globalStateSync.ts/GlobalStateSynchroniser/hasLocalData
class GlobalStateSynchroniser:	async hasLocalData(): Promise<boolean> {
		try {
			const { storage } = await this.localGlobalStateProvider.getLocalGlobalState(this.syncResource.profile);
			if (Object.keys(storage).length > 1 || storage[`${argvStoragePrefx}.locale`]?.value !== 'en') {
				return true;
			}
		} catch (error) {
			/* ignore error */
		}
		return false;
	}