public async Task Upsert(string id, DocumentBase <T> item)
{
var db = await this.db.Value;
await db.UpsertDocument(collectionName, id, item);
LogSave("Saved {@vm} for {documentKey}", item.VM, id);
}
public Task SaveAsync(DocumentBase <T> item, Func <T, string> keyFunc)
{
return(Upsert(keyFunc(item.VM), item));
}