src/vs/platform/userDataSync/common/userDataSyncServiceIpc.ts/ManualSyncTaskChannelClient/discard
class ManualSyncTaskChannelClient:	async discard(resource: URI): Promise<[SyncResource, ISyncResourcePreview][]> {
		const previews = await this.channel.call<[SyncResource, ISyncResourcePreview][]>('discard', [resource]);
		return this.deserializePreviews(previews);
	}