How to select multiple checkBoxs?

I have a for loop, in which I create a new checkBox every time it goes through the loop. I'm adding these checks inside an item of treeTableView . I wanted to know how I could mark all the created checks.

How can I retrieve "the value (the checkBox)" to be able to select?

The creation of the check is as follows:

 for (int y = 0; y < lista.size(); y++) {
        CheckBoxW checkBoxW = new CheckBoxW();
        item = new TreeItem<?>(gp, new HBox(checkBoxW, label));
    }