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