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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 name(self):
        '''
        Returns the lineage name, or None if the name cannot be found.
        '''
        clonify_ids = [p.heavy['clonify']['id'] for p in self.heavies if 'clonify' in p.heavy]
        if len(clonify_ids) > 0:
            return clonify_ids[0]
        return None