I suggest using either a bar or baz instead of exposing public methods. Create a safe object with the following code:

var baz = grc20.NewAdminToken(...)
var Baz = baz.GRC20()
// call Baz.Approve, etc directly

This recommendation reduces the codebase and eliminates redundancy. It demonstrates that the registry can function with standard public-facing grc20 implementations or grc20 objects. Ideally, keep a single foo file with public methods, while keeping the other files around 30 lines long. This approach will make the example more powerful and concise.

calling Baz.Transfer() does panic VM call panic: cannot modify external-realm or non-realm object because of updating its token balance.

as @tbruyelle mentioned, #1257 fix need to be settle down for this pr to use grc20 object instead of public methods