class mapper : object ... endval to_mapper : mapper -> Migrate_parsetree.Ast_406.Ast_mapper.mapperThe resulting mapper is "closed", i.e. methods ignore their first argument.
Ast_mapper_class_406class mapper : object ... endval to_mapper : mapper -> Migrate_parsetree.Ast_406.Ast_mapper.mapperThe resulting mapper is "closed", i.e. methods ignore their first argument.