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: daemonset_expansion.go
    path of file: ./repos/octant/vendor/k8s.io/client-go/listers/extensions/v1beta1
    
    the code of the file until where you have to start completion: /*
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by
    
func (s *daemonSetLister) GetPodDaemonSets(pod *v1.Pod) ([]*v1beta1.DaemonSet, error) {
	var selector labels.Selector
	var daemonSet *v1beta1.DaemonSet

	if len(pod.Labels) == 0 {
		return nil, fmt.Errorf("no daemon sets found for pod %v because it has no labels", pod.Name)
	}

	list, err := s.DaemonSets(pod.Namespace).List(labels.Everything())
	if err != nil {
		return nil, err
	}

	var daemonSets []*v1beta1.DaemonSet
	for i := range list {
		daemonSet = list[i]
		if daemonSet.Namespace != pod.Namespace {
			continue
		}
		selector, err = metav1.LabelSelectorAsSelector(daemonSet.Spec.Selector)
		if err != nil {
			// this should not happen if the DaemonSet passed validation
			return nil, err
		}

		// If a daemonSet with a nil or empty selector creeps in, it should match nothing, not everything.
		if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
			continue
		}
		daemonSets = append(daemonSets, daemonSet)
	}

	if len(daemonSets) == 0 {
		return nil, fmt.Errorf("could not find daemon set for pod %s in namespace %s with labels: %v", pod.Name, pod.Namespace, pod.Labels)
	}

	return daemonSets, nil
}