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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 vss_contexts(self):
 """ Return all virtual contexts for this VSS Container. :return list VSSContext """

        result = self.make_request(
            href=fetch_entry_point('visible_virtual_engine_mapping'),
            params={'filter': self.name})
        if result.get('mapping', []):
            return [Element.from_href(ve)
                for ve in result['mapping'][0].get('virtual_engine', [])]
        return []