get array of selected layers in photoshop via extendscript

Selected_layers-PS.jsx

var docRef = app.activeDocument;

cTID = function(s) { return app.charIDToTypeID(s); };
sTID = function(s) { return app.stringIDToTypeID(s); };

function newGroupFromLayers(doc) {
    var desc = new ActionDescriptor();
    var ref = new ActionReference();
    ref.putClass( sTID('layerSection') );
    desc.putReference( cTID('null'), ref );
    var lref = new ActionReference();
    lref.putEnumerated( cTID('Lyr '), cTID('Ordn'), cTID('Trgt') );
    desc.putReference( cTID('From'), lref);
    executeAction( cTID('Mk  '), desc, DialogModes.NO );
};

function undo() {
   executeAction(cTID("undo", undefined, DialogModes.NO));
};

function getSelectedLayers(doc) {
  var selLayers = [];
  newGroupFromLayers();

  var group = doc.activeLayer;
  var layers = group.layers;

  for (var i = 0; i < layers.length; i++) {
    selLayers.push(layers[i]);
  }

  undo();

  return selLayers;
};

var selectedLayers = getSelectedLayers(app.activeDocument);


for( i = 0; i < selectedLayers.length; i++) {
    selectedLayers[i].selected = true;
    docRef.activeLayer = selectedLayers[i];
    alert(docRef.activeLayer.name)
 }

One thing, the script's name isnt correct I believe. SInce this groups layers, why not name accordingly. PS why is that undo() in that loop?

My opinion, the main idea of this script is get the child layer, after grouping. He collect the child layer by that group (doc.activeLayer.layers), after collecting, he undo back to ungroup.

@no
I think this resize all items at once and the undoes the grouping.