Renders a Node and all sub-elements into an XML text representation.
Renders a Node and all sub-elements into an XML text representation. The caller is required to free the DOMString returned from this function using ixmlFreeDOMString when it is no longer required.Note that this function can be used for any Node-derived interface. A similar ixmlPrintDocument function is defined to avoid casting when printing whole documents. This function introduces lots of white space to print the DOMString in readable format.