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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 visit_object(self, node):
 """Fallback rendering for objects. If the current application is in debug-mode (``flask.current_app.debug`` is ``True``), an ``<!-- HTML comment -->`` will be rendered, indicating which class is missing a visitation function. Outside of debug-mode, returns an empty string. """

        if current_app.debug:
            return tags.comment('no implementation in {} to render {}'.format(
                self.__class__.__name__,
                node.__class__.__name__, ))
        return ''