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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 plot_phase_plane(self, indices=None, **kwargs):
 """ Plots a phase portrait from last integration. This method will be deprecated. Please use :meth:`Result.plot_phase_plane`. See :func:`pyodesys.plotting.plot_phase_plane` """

        return self._plot(plot_phase_plane, indices=indices, **kwargs)