src/vs/platform/userDataSync/common/userDataAutoSyncService.ts/AutoSync/hasDefaultServiceChanged
class AutoSync:	private async hasDefaultServiceChanged(): Promise<boolean> {
		const previous = await this.userDataSyncStoreManagementService.getPreviousUserDataSyncStore();
		const current = this.userDataSyncStoreManagementService.userDataSyncStore;
		// check if defaults changed
		return !!current && !!previous &&
			(!isEqual(current.defaultUrl, previous.defaultUrl) ||
				!isEqual(current.insidersUrl, previous.insidersUrl) ||
				!isEqual(current.stableUrl, previous.stableUrl));
	}