Reads the contents of the current node and the full
          subtree. It then makes the subtree available until the next
           xmlTextReaderRead() call

def Expand(self):
        """Reads the contents of the current node and the full
          subtree. It then makes the subtree available until the next
           xmlTextReaderRead() call """
        ret = libxml2mod.xmlTextReaderExpand(self._o)
        if ret is None:raise treeError('xmlTextReaderExpand() failed')
        __tmp = xmlNode(_obj=ret)
        return __tmp