Class Ocollection.ocollection
method virtual empty : 'omethod virtual add : 'a -> 'omethod virtual iter : ('a -> unit) -> unitmethod virtual view : ('a, 'o) viewmethod virtual del : 'a -> 'omethod virtual mem : 'a -> boolmethod virtual null : boolmethod fold : ('c -> 'a -> 'c) -> 'c -> 'cmethod fromlist : 'a list -> 'omethod exists : ('a -> bool) -> boolmethod filter : ('a -> bool) -> 'o