Can this be changed to a shared function that works for multiple instances as well as a single one?

I don't want to nest “a1” and “a2” inside it.
Because later, I also need to create separate paragraph styles “b1” and “b2” within that group.

Is it possible to achieve something like this:

`setParGroup([“b1”,“b2”])`

That is, maintain the ability to create multiple styles at once while also allowing creation of a single style.
Both should share the same

SetParGroup1();
SetParGroup2();
function SetParGroup1() {
    var wn = ["a1","a2"];
    for (var i = 0; i < wn.length; i++) {
        w = newParGroStyle(app.activeDocument, magGroParStn, wn[i])
    };
}
function SetParGroup2() {
    var wn = ["b1","b2"];
    for (var i = 0; i < wn.length; i++) {
        w = newParGroStyle(app.activeDocument, magGroParStn, wn[i])
    };
}
function newParGroStyle(d, g, n,) {
    // Get the group by name
    var group = d.paragraphStyleGroups.itemByName(g);
    // If group exists, check or create style
    if (!group.isValid)
        group = d.paragraphStyleGroups.add({ name: g })
    if (!group.paragraphStyles.itemByName(n).isValid)
        group.paragraphStyles.add({ name: n });
}

Specifically, can the following section share a single instance?

function SetParGroup1() {
var wn = [“a1”,“a2”];
for (var i = 0; i < wn.length; i++) {
w = newParGroStyle(app.activeDocument, magGroParStn, wn[i])
};
}