How to grunt concat in a wrapping function

I have three files containing js classes:

A.js
B.js
C.js

I'm trying to concatenate them to get something like:

var Module = (function (scope) {
// content of concatenation (ABC.js)
})(scope);

For now I'm using https://www.npmjs.com/package/grunt-contrib-concat to concatenate, I saw https://www.npmjs.com/package/grunt-wrap, it seems to be abandonned but look like what I want.

Someone has an idea to achieve it without using grunt-concat?

PS: I want to keep a *.map file for debug purpose

Solution