func (ie interfaceNumericals) Delta(id *types.Interface, ii, previousi InterfaceInfo) {
in, out := ie.InOut(ii)
previous_in, previous_out := ie.InOut(previousi)
id.DeltaIn = ps(in, previous_in)
id.DeltaOut = ps(out, previous_out)
}
func (_ interfaceBytes) Delta(id *types.Interface, ii, pi InterfaceInfo) {
id.DeltaIn = bps(8, ii.InBytes, pi.InBytes)
id.DeltaOut = bps(8, ii.OutBytes, pi.OutBytes)
}