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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 hide_zeroes(self):
        '''
        Sometimes it makes sense to hide the labels for subsets whose size is zero.
        This utility method does this.
        '''
        for v in self.subset_labels:
            if v is not None and v.get_text() == '0':
                v.set_visible(False)