+
−# type attribute might already be there if migrating from
+
−# version < 3.5 to version >= 3.5.3, BaseTransition being added
+
−# in bootstrap_migration
+
−if versions_map['cubicweb'][0] >= (3, 5, 0):
+
−    add_attribute('BaseTransition', 'type')
+
−    sync_schema_props_perms('state_of')
+
−    sync_schema_props_perms('transition_of')