Input TextField SetSelection?

Where did this go? I’m trying to have a good ol’ input text field have focus when the application loads so the user doesn’t have to click on it first.
I see a setSelection() method which lets you select part of the string in the field but nothing that give the TF focus in the first place.

FocusManager seems to work with components only and i’m using an input textfield that I drew in the IDE.

This can’t be that complicated.