I am generating individual letters of a word into their own containers and I need to get the width of each container and add them to a list. How do I go about achieving this?

For example, if the word is `"character"` then flutter will render: `[c][h][a][r][a][c][t][e][r]`

Initially, I was using `GlobalKeys` to retrieve the width however, since I split the code into multiple files, I couldn't figure out how to access the `GlobalKeys` from another file and I can't find any information on google how to do that. Also, if the word has 20 letters then I will need to declare 20 `GlobalKeys` and a `map` to store those 20 keys.

I figure it would be better if there was a way to retrieve each container's width and store them in a list as they are being generated.

```html
String displayWord = "character";

final [key0 to key19] = GlobalKey(); //PREVIOUS APPROACH
Map keys = { ** map of 20 keys ** }; //PREVIOUS APPROACH
.
.
.
    return Row(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: List.generate(displayWord.length, (index) {
          return Container(
            key: keys[index], //PREVIOUS APPROACH
            child: Text(displayWord[index]),
          );
        }));
```