Module Async_bus.First_arity
type (_, _, _) t = | Arity1 : ('a -> unit, 'a -> 'r option, 'r) t| Arity2 : ('a -> 'b -> unit, 'a -> 'b -> 'r option, 'r) t| Arity3 : ('a -> 'b -> 'c -> unit, 'a -> 'b -> 'c -> 'r option, 'r) t| Arity4 : ('a -> 'b -> 'c -> 'd -> unit, 'a -> 'b -> 'c -> 'd -> 'r option, 'r)
t
val sexp_of_t :
('v_x__001_ -> Ppx_sexp_conv_lib.Sexp.t) ->
('v_x__002_ -> Ppx_sexp_conv_lib.Sexp.t) ->
('v_x__003_ -> Ppx_sexp_conv_lib.Sexp.t) ->
('v_x__001_, 'v_x__002_, 'v_x__003_) t ->
Ppx_sexp_conv_lib.Sexp.t