def get_asset_lookup_session_for_repository(self, repository_id=None, proxy=None):
        """Gets the ``OsidSession`` associated with the asset lookup service for the
        given repository.

        arg:    repository_id (osid.id.Id): the ``Id`` of the repository
        arg:    proxy (osid.proxy.Proxy): a proxy
        return: (osid.repository.AssetLookupSession) - an
                ``AssetLookupSession``
        raise:  NotFound - ``repository_id`` not found
        raise:  NullArgument - ``repository_id`` or ``proxy`` is
                ``null``
        raise:  OperationFailed - ``unable to complete request``
        raise:  Unimplemented - ``supports_asset_lookup()`` or
                ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_asset_lookup()`` and
        ``supports_visible_federation()`` are ``true``.*

        """
        return AssetLookupSession(
            self._provider_manager.get_asset_lookup_session_for_repository(repository_id,
                                                                           proxy),
            self._config_map)