ExtJs 4 - Convert JS object to xml

Im using ExtJs 4.2.1.

Is there an "easy" way to convert JS object to xml? I mean a simple function like:

Ext.JSON.encode(object);

To convert object to Json.

Lets say the following object for example:

Root:
  Child1
  Child2
  Child3

To the following xml:

<Root>
   <Child1> some value </Child1>
   <Child2> some value </Child2>
   <Child3> some value </Child3>
</Root>

I was trying to search it in the documentation, but didn't came to any solution like that.

Thanks.