1 # type attribute might already be there if migrating from

     1 raise NotImplementedError("Cannot migrate such an old version. Use intermediate Cubiweb version (try 3.16.x)")

     2 # version < 3.5 to version >= 3.5.3, BaseTransition being added

     3 # in bootstrap_migration

     4 if versions_map['cubicweb'][0] >= (3, 5, 0):

     5     add_attribute('BaseTransition', 'type')

     6     sync_schema_props_perms('state_of')

     7     sync_schema_props_perms('transition_of')