Is it possible to drop elements to inside iframe element with help of dragula drag and drop plugin ? plugin

How this work normally

<div id="left">
<span>test1</span>
<span>test2</span>
<span>test3</span>
</div>

<div id="right">

</div>

dragula([$("#left")[0], $("#right")[0] ]);

But now <div id="right"> element moved to <iframe> tag

<div id="left">

</div>

<iframe>
    <div id="right">
    
    </div>
</iframe>
    dragula([$("#left")[0], $('iframe').contents().find("#right")[0] ]);

How to do drag and drop with iframe tag - jsFiddle