destinationsByGateway map[string]sets.String

	// Map of VS hostname -> referenced hostnames
	referencedDestinations map[string]sets.String
}

func newVirtualServiceIndex() virtualServiceIndex {
	out := virtualServiceIndex{
		publicByGateway:              map[string][]config.Config{},
		privateByNamespaceAndGateway: map[types.NamespacedName][]config.Config{},