Transitioning.List
val concat_map : ( 'a -> 'b list ) -> 'a list -> 'b list
since 4.10.0
val equal : ( 'a -> 'a -> bool ) -> 'a list -> 'a list -> bool
since 4.12.0
val compare : ( 'a -> 'a -> int ) -> 'a list -> 'a list -> int