You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: leader.go
    path of file: ./repos/kubernetes-ingress/internal/k8s
    
    the code of the file until where you have to start completion: package k8s

import (
	"context"
	"os"
	"time"

	"github.com/golang/glog"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	"k8s.io/client-go/kubernetes/scheme"
	"k8s.io/client-go/tools/leaderelection"
	"k8s.io/client-go/tools/leaderelection/resourcelock"
	"k8s.io/client-go/tools/record"
)

// newLeaderElector creates a new LeaderElection and returns the Elector.
func newLeaderElector(client kubernetes.Interface, callbacks leaderelection.LeaderCallbacks, namespace string, lockName string) (*leaderelection.LeaderElector, error) {
	podName := os.Getenv("POD_NAME")

	broadcaster := record.NewBroadcaster()
	hostname, _ := os.Hostname()

	source := v1.EventSource{Component: "nginx-ingress-leader-elector", Host: hostname}
	recorder := broadcaster.NewRecorder(scheme.Scheme, source)

	lc := resourcelock.ResourceLockConfig{
		Identity:      podName,
		EventRecorder: recorder,
	}

	leaseMeta := metav1.ObjectMeta{
		Namespace: namespace,
		Name:      lockName,
	}

	lock := &resourcelock.LeaseLock{
		LeaseMeta:  leaseMeta,
		Client:     client.CoordinationV1(),
		LockConfig: lc,
	}

	ttl := 30 * time.Second
	return leaderelection.NewLeaderElector(
		leaderelection.LeaderElectionConfig{
			Lock:          lock,
			LeaseDuration: ttl,
			RenewDeadline: ttl / 2,
			RetryPeriod:   ttl / 4,
			Callback
    
func createLeaderHandler(lbc *LoadBalancerController) leaderelection.LeaderCallbacks {
	return leaderelection.LeaderCallbacks{
		OnStartedLeading: func(ctx context.Context) {
			glog.V(3).Info("started leading")
			// Closing this channel allows the leader to start the telemetry reporting process
			if lbc.telemetryChan != nil {
				close(lbc.telemetryChan)
			}
			if lbc.reportIngressStatus {
				ingresses := lbc.configuration.GetResourcesWithFilter(resourceFilter{Ingresses: true})

				glog.V(3).Infof("Updating status for %v Ingresses", len(ingresses))

				err := lbc.statusUpdater.UpdateExternalEndpointsForResources(ingresses)
				if err != nil {
					glog.V(3).Infof("error updating status when starting leading: %v", err)
				}
			}

			if lbc.areCustomResourcesEnabled {
				glog.V(3).Info("updating VirtualServer and VirtualServerRoutes status")

				err := lbc.updateVirtualServersStatusFromEvents()
				if err != nil {
					glog.V(3).Infof("error updating VirtualServers status when starting leading: %v", err)
				}

				err = lbc.updateVirtualServerRoutesStatusFromEvents()
				if err != nil {
					glog.V(3).Infof("error updating VirtualServerRoutes status when starting leading: %v", err)
				}

				err = lbc.updatePoliciesStatus()
				if err != nil {
					glog.V(3).Infof("error updating Policies status when starting leading: %v", err)
				}

				err = lbc.updateTransportServersStatusFromEvents()
				if err != nil {
					glog.V(3).Infof("error updating TransportServers status when starting leading: %v", err)
				}
			}
		},
		OnStoppedLeading: func() {
			glog.V(3).Info("stopped leading")
		},
	}
}