Of_monad_without_return3.1-A
type ('a, 'd, 'e) t
val map : ('a, 'd, 'e) t -> f:('a -> 'b) -> ('b, 'd, 'e) t
val bind : ('a, 'd, 'e) t -> f:('a -> ('b, 'd, 'e) t) -> ('b, 'd, 'e) t