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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 signal_panel(self, ax, feature):
 """ Plots each genomic signal as a line using the corresponding plotting_kwargs """

        for gs, kwargs in zip(self.genomic_signal_objs, self.plotting_kwargs):
            x, y = gs.local_coverage(feature, **self.local_coverage_kwargs)
            ax.plot(x, y, **kwargs)
        ax.axis('tight')
        return feature