src/vs/platform/userDataSync/common/userDataSyncEnablementService.ts/UserDataSyncEnablementService/isEnabled
class UserDataSyncEnablementService:	isEnabled(): boolean {
		switch (this.environmentService.sync) {
			case 'on':
				return true;
			case 'off':
				return false;
		}
		return this.storageService.getBoolean(enablementKey, StorageScope.APPLICATION, false);
	}