src/vs/platform/userDataSync/common/userDataSyncStoreService.ts/UserDataSyncStoreClient/resolveContent
class UserDataSyncStoreClient:	async resolveContent(resource: ServerResource, ref: string): Promise<string | null> {
		if (!this.userDataSyncStoreUrl) {
			throw new Error('No settings sync store url configured.');
		}

		const url = joinPath(this.userDataSyncStoreUrl, 'resource', resource, ref).toString();
		const headers: IHeaders = {};
		headers['Cache-Control'] = 'no-cache';

		const context = await this.request(url, { type: 'GET', headers }, [], CancellationToken.None);
		const content = await asTextOrError(context);
		return content;
	}