Vif_core.HandlerSourcetype ('socket, 'c, 'value) t =
('socket, 'c, string) Vif_core__.Vif_request.t ->
string ->
Vif_core__.Vif_server.t ->
'value ->
(Vif_core__.Vif_response.empty, Vif_core__.Vif_response.sent, unit)
Vif_core__.Vif_response.t
option