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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 export(self, path, session):
 """See `Module.export`."""

    def variables_saver(variables_path):
      if self._saver:
        self._saver.save(
            session, variables_path,
            write_meta_graph=False,
            write_state=False)

    self._spec._export(path, variables_saver)