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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 save(self, path, **kwargs):
 """ Save the plot to the file at `path`. Any keyword arguments are passed to [`matplotlib.pyplot.savefig`][1]. [1]: http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.savefig """

        self.plot if not hasattr(self, '_plot') else None
        self.figure.savefig(path, **kwargs)