75     def mih_register(cls, repo):

    75     def mih_register(cls, repo):

    76         # may be already registered in tests (e.g. unittest_migractions at

    76         # may be already registered in tests (e.g. unittest_migractions at

    77         # least)

    77         # least)

    78         if not cls.__regid__ in repo.vreg['after_add_entity_hooks']:

    78         if not cls.__regid__ in repo.vreg['after_add_entity_hooks']:

    79             repo.vreg.register(ClearGroupMap)

    79             repo.vreg.register(ClearGroupMap)

    80 

    81 

    81 class ServerMigrationHelper(MigrationHelper):

    82 class ServerMigrationHelper(MigrationHelper):

    82     """specific migration helper for server side migration scripts,

    83     """specific migration helper for server side migration scripts,

    83     providing actions related to schema/data migration

    84     providing actions related to schema/data migration

    84     """

    85     """