code: func (proxier *Proxier) cleanupStaleStickySessions() {
  	proxier.mu.Lock()
  	defer proxier.mu.Unlock()
  	servicePortNameMap := make(map[proxy.ServicePortName]bool)
  	for name := range proxier.serviceMap {
  		servicePortName := proxy.ServicePortName{
  			NamespacedName: types.NamespacedName{
  				Namespace: name.Namespace,
  				Name:      name.Name,
  			},
  			Port: name.Port,
  		}
  		if servicePortNameMap[servicePortName] == false {
  			// ensure cleanup sticky sessions only gets called once per serviceportname
  			servicePortNameMap[servicePortName] = true
  			proxier.loadBalancer.CleanupStaleStickySessions(servicePortName)
  		}
  	}
  }
docs: // cleanupStaleStickySessions cleans up any stale sticky session records in the hash map.