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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 as_json(self, path="", with_indent=False):
 """ Return a rendering of the current state in JSON. """

        if path not in self.top_level_links:
            raise StateError("Unknown path")

        return json.dumps(self.get_state_repr(path),
                          indent=4 if with_indent else None)