chore: move wrap to be method _expose()

[Uzlopak]

Make wrap() function a method _expose()

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm

[mcollina]

Possibly it might be better to move this into its separate file and keep it a function. Boot has a already too many responsibilities.

[Uzlopak]

I plan to reduce the complexity of boot. Here the original wrap function makes much more sense, to be part of boot class, as it is 99% about boot and the modification of the underlying server with methods of boot.