def next_node(self, condition=None,
                  include_self=0, descend=1, siblings=0, ascend=0):
        iterable = self.traverse(condition=condition,
                                 include_self=include_self, descend=descend,
                                 siblings=siblings, ascend=ascend)
        try:
            return iterable[0]
        except IndexError:
            return None
Return the first node in the iterable returned by traverse(),
dataset/ETHPy150Open adieu/allbuttonspressed/docutils/nodes.py/Node.next_node