`constraint 'b located_map2 = 'b located_map2`
`method visit_lexing_position : 'env. 'env -> Morbig.CSTVisitors.lexing_position -> Morbig.CSTVisitors.lexing_position -> Morbig.CSTVisitors.lexing_position`
`method visit_located : 'env 'a_0 'a_1 'a_2. ('env -> 'a_0 -> 'a_1 -> 'a_2) -> 'env -> 'a_0 Morbig.CSTVisitors.located -> 'a_1 Morbig.CSTVisitors.located -> 'a_2 Morbig.CSTVisitors.located`
`method visit_position : 'env. 'env -> Morbig.CSTVisitors.position -> Morbig.CSTVisitors.position -> Morbig.CSTVisitors.position`