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: result.go
    path of file: ./repos/kubernetes/staging/src/k8s.io/cli-runtime/pkg/resource
    
    the code of the file until where you have to start completion: /*
Copyright 2014 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 appli
    
func (r *Result) Watch(resourceVersion string) (watch.Interface, error) {
	if r.err != nil {
		return nil, r.err
	}
	if len(r.sources) != 1 {
		return nil, fmt.Errorf("you may only watch a single resource or type of resource at a time")
	}
	w, ok := r.sources[0].(Watchable)
	if !ok {
		info, err := r.Infos()
		if err != nil {
			return nil, err
		}
		if len(info) != 1 {
			return nil, fmt.Errorf("watch is only supported on individual resources and resource collections - %d resources were found", len(info))
		}
		return info[0].Watch(resourceVersion)
	}
	return w.Watch(resourceVersion)
}