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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(self):
 """ Visualize the state. :return: The generated figure. :rtype: matplotlib.Figure """

        width = 10
        # The pleasing golden ratio.
        height = width / 1.618
        f = plt.figure(figsize=(width, height))
        ax = f.add_subplot(111, projection="3d")

        self.plot_state_histogram(ax)
        return f