Inject wrapped expression into braces

Hello. I`m trying to change PHP file content on QF. 

val code = PhpPsiElementFactory.createPhpPsiFromText(
        project,
        NewExpressionImpl::class.java,
        "new $selectFqn()"
)
reference.replace(code)

it works great. But in some cases i need to inject wrapped expression. 

Instead of `new UserSelect()` i need `(new UserSelect())`.

How can I create and insert this expression (surrounded by braces)? Thanks for the help.