Parameter PipeOps_flat_map.S
val map : ('x -> 'y) -> 'x t -> 'y t
val flat_map : ('x -> 'y t) -> 'x t -> 'y t
val iter : ('x -> unit) -> 'x t -> unit
val fold_left : ('acc -> 'x -> 'acc) -> 'acc -> 'x t -> 'acc
val filter : ('x -> bool) -> 'x t -> 'x t
val filter_map : ('x -> 'y option) -> 'x t -> 'y t