typedef void(* VortexIoDestroyFdGroup)(axlPointer fd_set)

IO handler definition to allow defining the method to be invoked while destroying a fd set.

The reference that the handler will receive is the one created by the VortexIoCreateFdGroup handler.

VortexIoDestroyFdGroupThe fd_set, opaque to vortex, pointer to a structure representing the fd set to be destroy.