Module type Container.S0

module type S0 = sig .. end

type container 

type elt 

val length : container -> int

val is_empty : container -> bool

val iter : container -> f:(elt -> unit) -> unit

val fold : container -> init:'a -> f:('a -> elt -> 'a) -> 'a

val exists : container -> f:(elt -> bool) -> bool

val for_all : container -> f:(elt -> bool) -> bool

val find : container ->
       f:(elt -> bool) -> elt option

val to_list : container -> elt list

val to_array : container -> elt array