I want to create "very long" table with news, but I don't know how many news server exists. 1 cell = 1 news. When user will scroll his table, I will add cells with news dynamically.
I get news by bundles (first 5, second 5, ...).

What is the best way to set the number of rows?

```
func tableView(_ tableView:UITableView, numberOfRowsInSection section:Int) -> Int
    {
        return ???
    }

```