include module type of BatOption.Infix
val (|?) : 'a option -> 'a -> 'aval (>>=) : 'a option -> ('a -> 'b option) -> 'b optionval (<$>) : ('a -> 'b) -> 'a option -> 'b optionval (>>|) : 'a option -> ('a -> 'b) -> 'b optionval (=<<) : ('a -> 'b t) -> 'a t -> 'b t