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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 get_cb_plot(cb, plot=None):
 """ Finds the subplot with the corresponding stream. """

    plot = plot or cb.plot
    if isinstance(plot, GeoOverlayPlot):
        plots = [get_cb_plot(cb, p) for p in plot.subplots.values()]
        plots = [p for p in plots if any(s in cb.streams and getattr(s, '_triggering', False)
                                         for s in p.streams)]
        if plots:
            plot = plots[0]
    return plot