src/vs/platform/userDataSync/common/userDataSyncService.ts/UserDataSyncService/resolveContent
class UserDataSyncService:	async resolveContent(resource: URI): Promise<string | null> {
		for (const synchroniser of this.synchronisers) {
			const content = await synchroniser.resolveContent(resource);
			if (content) {
				return content;
			}
		}
		return null;
	}