Implemented in 1.7.2 through a very similar way

@MichaelXF little note about getting global object.
Code can be wrapped in other function like this:

(function(window, globalThis, self, global) {
    // code
})(fakeProxyWindow, fakeProxyWindow, fakeProxyWindow, fakeProxyWindow)

and Function can be easily redefined.

window.Function = Function.prototype.constructor = new Proxy(Function, {
    apply(target, thisArg, args) {
         return Reflect.apply(target, thisArg, args).bind("fakeProxyWindowObject")
    }
});

The only way to get pure this with ability to check is by eval.
Eval has unique behaviour. It has access to the local scope, unless it is redefined.

let check = false;
eval("check = true")
if (!check) {
    throw new Error("Eval was redefined")
}

const root = eval("this");

Example:

Also I should note that we can get root by other NON-global function constructors, like GeneratorFunction or AsyncFunction or AsyncGeneratorFunction.

The only way to get pure this with ability to check is by eval. Eval has unique behaviour. It has access to the local scope, unless it is redefined.

let check = false;
eval("check = true")
if (!check) {
    throw new Error("Eval was redefined")
}

const root = eval("this");

This is great, I'll try to find a way to implement this trick.