Action structure. See the section 7.2.5 of the OpenFlow 1.3.4 specification
val sizeof : t ‑> int
val marshal : Cstruct.t ‑> t ‑> int
val parse : Cstruct.t ‑> t
val parse_sequence : Cstruct.t ‑> sequence
val from_of_action : OpenFlow.action ‑> t
val from_of_seq : OpenFlow.seq ‑> sequence