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: ingress.go
    path of file: ./repos/portainer/api/http/models/kubernetes
    
    the code of the file until where you have to start completion: package kubernetes

import (
	"errors"
	"net/http"
	"time"
)

type (
	K8sIngressController struct {
		Name         string `json:"Name"`
		ClassName    string `json:"ClassName"`
		Type         string `json:"Type"`
		Availability bool   `json:"Availability"`
		New   
    
func (r K8sIngressDeleteRequests) Validate(request *http.Request) error {
	if len(r) == 0 {
		return errors.New("missing deletion request list in payload")
	}

	for ns := range r {
		if len(ns) == 0 {
			return errors.New("deletion given with empty namespace")
		}
	}

	return nil
}