Extending ..extendscript

Is there a way to extend certain build in elements. Like you can add functinoality to arrays by :

Array.prototype.sum

I'd like to add functionality to the ScriptUI elemtns like groups/panels or text-elements.

Consider the following code:

function thedialog(){
    dlg = new Window ('dialog', "Zum Tezts");

    //this is the simple way
        dlg.grpTools = dlg.add( 'group' );
        //using function and sending the element
        colorizeOne( dlg.grpTools, panelColors.red );

        dlg.grpTools.add( 'statictext', [4,2,150,25], "this should be top" );
        dlg.grpTools.ButtonDo      = dlg.grpTools.add ('button', undefined, "Do me!");

  
    //this is (imo) a better way
        (dlg.grpHelp = dlg.add( 'group')).colorize = colorizeTwo;
        //having this as part of the element itself
        dlg.grpHelp.colorize( panelColors.blue );

        dlg.grpHelp.add( 'statictext', [4,2,150,25], "this should be bottom" );
        dlg.grpHelp.ButtonDo      = dlg.grpHelp.add ('button', undefined, "No, do me!");
        
        
        
        dlg.grpTools.ButtonDo.onClick = function(  ){
            dlg.grpHelp.colorize( panelColors.green );
            colorizeOne (dlg.grpTools, panelColors.grey);
        }        
        
        dlg.grpHelp.ButtonDo.onClick = function(  ){
            this.parent.colorize( panelColors.red );
            colorizeOne (dlg.grpTools, panelColors.blue);
        }
        
        
        dlg.buttonCancel = dlg.add ('button', undefined, "Cancel");
        dlg.show();            
 }

    function colorizeOne( element, color ){
        //alert(color);
        element.graphics.backgroundColor = element.graphics.newBrush (element.graphics.BrushType.SOLID_COLOR,color);
    }

    function colorizeTwo( color ){
        //alert(color);
        this.graphics.backgroundColor = this.graphics.newBrush (this.graphics.BrushType.SOLID_COLOR,color);
    }


    var panelColors = {
            grey :  [0.5,0.5,0.5],  //grey
            blue :  [0.5,0.5,0.7],  //lila
            green : [0.5,0.7,0.5],  //green
            red :   [0.7,0.5,0.5],  //red
    }

//do it!
thedialog();

As you can see, I added the functionality to change color to the second group. Which is fine for our example, but what I REALLY want is for all groups and panels to adopt that behavior. Because having to add [element.colorize=colorize] every time makes the whole endavour a bit useless. 

So, what I'm really looking for is something like:

ScriptUI.Group.prototype.setColor = colorize;

Which is obviously not the right code.. 

Anyone know? Is there an easyer way I'm not seeing? Would LOVE prototype access to the core objects..