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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, template: str, **vars) -> str: """ Render the named template. The current context will be available to the template as the ``ctx`` variable. :param template: name of the template file :param vars: extra template variables :return: the rendered results """

        vars.setdefault('ctx', self._ctx)
        return self._renderer.render(template, **vars)