def swap(self, core, other):
        """http://wiki.apache.org/solr/CoreAdmin#head-928b872300f1b66748c85cebb12a59bb574e501b"""
        params = {
            'action': 'SWAP',
            'core': core,
            'other': other,
        }
        return self._get_url(self.url, params=params)