Polymorphic2
Same as Polymorphic for polymorphic types with two type variables.
Polymorphic
type ('a, 'b) poly
val instantiate : 'a t -> 'b t -> ('a, 'b) poly t * bool
val is_instance_of : 'a t -> bool
val get_instance : ('a, 'b) poly t -> 'a t * 'b t