how to object group

certain operations after the

I want to group selection

How can I do

app.activeDocument.align(app.activeDocument.selection,AlignOptions.RIGHT_EDGES, AlignDistributeBounds.ITEM_BOUNDS);

app.activeDocument.align(app.activeDocument.selection,AlignOptions.TOP_EDGES, AlignDistributeBounds.ITEM_BOUNDS);

var myDoc = app.activeDocument; 

var mySel = myDoc.selection; 

app.selection[0].groups(); /??