Provides default implementations for some advanced event handlers, reducing clutter in simple controllers.
These event handlers simply ignore the messages they receive.
val switch_connected : Frenetic_kernel.OpenFlow0x01.switchId ‑> Frenetic_kernel.OpenFlow0x01.SwitchFeatures.t ‑> unit
val barrier_reply : Frenetic_kernel.OpenFlow0x01.switchId ‑> Frenetic_kernel.OpenFlow0x01.xid ‑> unit