`sig
class input_gzip : Gzip.in_channel -> Netchannels.in_obj_channel
class output_gzip : Gzip.out_channel -> Netchannels.out_obj_channel
class inflating_pipe : unit -> Netchannels.io_obj_channel
class deflating_pipe : ?level:int -> unit -> Netchannels.io_obj_channel
class input_inflate :
Netchannels.in_obj_channel -> Netchannels.in_obj_channel
class input_deflate :
?level:int -> Netchannels.in_obj_channel -> Netchannels.in_obj_channel
class output_inflate :
Netchannels.out_obj_channel -> Netchannels.out_obj_channel
class output_deflate :
?level:int -> Netchannels.out_obj_channel -> Netchannels.out_obj_channel
val init : unit -> unit
end`