Unsubscribe.Request
val has_subscription_id : t -> bool
val subscription_id_get : t -> SubscriptionId.t
val subscription_id_set_reader :
t ->
SubscriptionId.struct_t reader_t ->
SubscriptionId.t
val subscription_id_set_builder : t -> SubscriptionId.t -> SubscriptionId.t
val subscription_id_init : t -> SubscriptionId.t
val init_root : ?message_size:int -> unit -> t