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