Clone a method for my custom object.

Hi!

We have a method:

comp.saveFrameToPng(compTime, fileObj);

I have my custom object block.

Is it possible to clone "saveFrameToPng" method for my custom object?

I've tried:

Function.prototype.clone = function() {

    var that = this;

    var temp = function temporary() { return that.apply(this, arguments); };

    for(var key in this) {

        if (this.hasOwnProperty(key)) {

            temp[key] = this[key];

        }

    }

    return temp;

};

And then in my custom object:

function block (comp)

{

this.saveFrame = comp.saveFrameToPng.clone();

}

But thin won't work properly

Help me please if this possible.

Thank you in advance!