def get_authorizations(self):
        """Gets the authorization list resulting from the search.

        return: (osid.authorization.AuthorizationList) - the
                authorization list
        raise:  IllegalState - list has already been retrieved
        *compliance: mandatory -- This method must be implemented.*

        """
        if self.retrieved:
            raise errors.IllegalState('List has already been retrieved.')
        self.retrieved = True
        return objects.AuthorizationList(self._results, runtime=self._runtime)