class [('a, 'b, 'c)] o_output : ('a, 'b, 'c) IO.output -> object end
('a, 'b, 'c)
('a, 'b, 'c) IO.output -> object end
method write : 'a -> unit
'a -> unit
method nwrite : 'b -> unit
'b -> unit
method pos : int
int
method flush : unit
unit
method close : 'c
'c