I have some VO's, and I use their class type to render a form.  My Dialogue 
I'm passing this VO into is bound to an object, like so:

private var formData:Object;

<mx:TextInput text="{formData.label}" />

When I call this method externally:

myDialogue.setFormData(someVO);

Function looks something like this:

function setFormData(o)
{
    for(var p in o)
    {
        formData[p] = o[p];
    }
}

My bindings work great.  However, instanceof does not.  If I do this:

formData = o;

It DOES work; naturally because it's just a reference.  However, this 
dialogue works like a preferences.  As such, I need to create my own local 
copy; the above for loop is actually more involved since I need a deep copy, 
and thus get a true, deep copy, not a reference.

However, this in turn breaks my instanceof code.  I've tried:

formData.__proto__ = o.prototype
formData.__proto__ = o.__proto__

...none of which work.  Frankly, I really don't care formData is truly a 
sub-class, I just want my instanceof to work, even if it's taked.

???
 



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