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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 example_panel(self, ax, feature):
 """ A example panel that just prints the text of the feature. """

        txt = '%s:%s-%s' % (feature.chrom, feature.start, feature.stop)
        ax.text(0.5, 0.5, txt, transform=ax.transAxes)
        return feature