Using $form->schema with Select field's createOptionForm

Hi all

I've got a complex form that I've extracted to a separate class for re-use. I'm returning it in resource pages using

return MyForm::build($form)

return MyForm::build($form)

and it works well. I'd like to re-use the form for a related resource's select field's

->createOptionForm

->createOptionForm

. Does anyone know of a way to do that?

Thanks!