code: def nextElementSibling(self):
          
          ret = libxml2mod.xmlNextElementSibling(self._o)
          if ret is None:return None
          __tmp = xmlNode(_obj=ret)
          return __tmp
docs: Finds the first closest next sibling of the node which is
            an element node. Note the handling of entities references
            is different than in the W3C DOM element traversal spec
            since we don't have back reference from entities content to
             entities references.