previous := i.keyToInstance[key]
	if previous != nil {
		i.ipToKeys.Delete(previous.Endpoint.Address, key)
	}
	i.ipToKeys.Delete(wi.Endpoint.Address, key)
	delete(i.keyToInstance, key)
	return previous
}

// GetByIP implements Index.
func (i *index) GetByIP(ip string) []*model.WorkloadInstance {
	i.mu.RLock()
	defer i.mu.RUnlock()

	keys := i.ipToKeys[ip]
	if len(keys) == 0 {
		return nil
	}