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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def render(self, renderer=None, **kwargs):
 """Render the navigational item using a renderer. :param renderer: An object implementing the :class:`~.Renderer` interface. :return: A markupsafe string with the rendered result. """

        return Markup(get_renderer(current_app, renderer)(**kwargs).visit(
            self))