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: generic.go
    path of file: ./repos/kubernetes-ingress/pkg/client/informers/externalversions
    
    the code of the file until where you have to start completion: // Code generated by informer-gen. DO NOT EDIT.

package externalversions

import (
	"fmt"

	configurationv1 "github.com/nginxinc/kubernetes-ingress/pkg/apis/configuration/v1"
	v1alpha1 "github.com/nginxinc/kubernetes-ingress/pkg/apis/configuration/v1alpha1"
	v1beta1 "github.com/nginxinc/kubernetes-ingress/pkg/apis/dos/v1beta1"
	v1 "github.com/nginxinc/kubernetes-ingress/pkg/apis/externaldns/v1"
	schema "k8s.io/apimachinery/pkg/runtime/schema"
	cache "k8s.io/client-go/tools/cache"
)

// GenericInformer is type of SharedIndexInformer which will locate and delegate to other
// sharedInformers based on type
type GenericInformer interface {
	Informer() cache.SharedIndexInformer
	Lister() cache.GenericLister
}

type genericInformer struct {
	informer cache.SharedIndexInformer
	resource schema.GroupResource
}

// Informer returns the SharedIndexInformer.
func (f *genericInformer) Informer() cache.SharedIndexInformer {
	return f.informer
}

// Lister returns the GenericLister.
func (f *genericInformer) Lister() cache.GenericLister {
	return cache.NewGenericLister(f.Informer().GetIndexer(), f.resource)
}

// ForResource gives generic access to a shared informer of the matching type
// TODO extend this to unknown resources with a client pool
func (f *sharedInformerFactory) ForResource(resource schema.GroupVersionResource) (GenericInformer, error) {
	switch resource {
	// Group=appprotectdos.f5.com, Version=v1beta1
	case v1beta1.SchemeGroupVersion.WithResource("dosprotectedresources"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.Appprotectdos().V1beta1().DosProtectedResources().Inform
    
func (f *sharedInformerFactory) ForResource(resource schema.GroupVersionResource) (GenericInformer, error) {
	switch resource {
	// Group=appprotectdos.f5.com, Version=v1beta1
	case v1beta1.SchemeGroupVersion.WithResource("dosprotectedresources"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.Appprotectdos().V1beta1().DosProtectedResources().Informer()}, nil

		// Group=externaldns.nginx.org, Version=v1
	case v1.SchemeGroupVersion.WithResource("dnsendpoints"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.Externaldns().V1().DNSEndpoints().Informer()}, nil

		// Group=k8s.nginx.org, Version=v1
	case configurationv1.SchemeGroupVersion.WithResource("globalconfigurations"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1().GlobalConfigurations().Informer()}, nil
	case configurationv1.SchemeGroupVersion.WithResource("policies"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1().Policies().Informer()}, nil
	case configurationv1.SchemeGroupVersion.WithResource("transportservers"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1().TransportServers().Informer()}, nil
	case configurationv1.SchemeGroupVersion.WithResource("virtualservers"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1().VirtualServers().Informer()}, nil
	case configurationv1.SchemeGroupVersion.WithResource("virtualserverroutes"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1().VirtualServerRoutes().Informer()}, nil

		// Group=k8s.nginx.org, Version=v1alpha1
	case v1alpha1.SchemeGroupVersion.WithResource("globalconfigurations"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1alpha1().GlobalConfigurations().Informer()}, nil
	case v1alpha1.SchemeGroupVersion.WithResource("policies"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1alpha1().Policies().Informer()}, nil
	case v1alpha1.SchemeGroupVersion.WithResource("transportservers"):
		return &genericInformer{resource: resource.GroupResource(), informer: f.K8s().V1alpha1().TransportServers().Informer()}, nil

	}

	return nil, fmt.Errorf("no informer found for %v", resource)
}