I have the following variable:

```
List<List<String>> selection = Lists.newArrayList();

```

Where after I do my adds to populate the `selections`

I want to modify one of the entries using the .set function like so:

```
selection.set(10, "modifiedentry");

```

But I am getting an error where I am provideing a String and not a List

How do I provide a List in my case?