Extracting sub-tree XML string with TinyXml2

I want to do the exact same thing as the guy in this question.

I want to convert an XML child element (and all of its children) to an XML string, so if the XML structure were

<parent> <child> <value>abc</value> </child> <parent>

I want the xml for the child element, e.g.

<child> <value>abc</value> </child>

I don't care about whitespace. The problem is that the accepted answer from the other question appears to be out of date, because there is no "Print" method for XMLElement objects. Can I do this with TinyXml2?