3 for rtype in ('cw_support', 'cw_dont_cross', 'cw_may_cross'):

     1 for rtype in ('cw_support', 'cw_dont_cross', 'cw_may_cross'):

     4     drop_relation_type(rtype)

     2     drop_relation_type(rtype)

     5 

     3 

     6 add_entity_type('CWSourceSchemaConfig')

     4 add_entity_type('CWSourceSchemaConfig')

     7 

     5