def default_visit(self, node):
        newnode = node.copy()
        self.parent.append(newnode)
        self.parent_stack.append(self.parent)
        self.parent = newnode
Copy the current node, and make it the new acting parent.
dataset/ETHPy150Open adieu/allbuttonspressed/docutils/nodes.py/TreeCopyVisitor.default_visit