The payload of a request message.
WIRE_PAYLOAD to deal with caps rather than attachments.
type t = Wire.Request.t
field t path looks up
path in the message and returns the capability at that index. Returns
None if the field wasn't set. Returns a broken capability if an index was given but does not exist (i.e. the message is corrupted). Increases the ref-count on the result.
with_caps caps t is a copy of
t with a new set of capabilities. This is useful to implement
TakeFromOtherQuestion, where the message is the same but embargoes may be needed, and to break cycles.
val release : t -> unit
release t frees all the capabilities attached to this message. It is safe to call this multiple times; only the first call has any effect.