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: config.go
    path of file: ./repos/kubernetes/staging/src/k8s.io/apiserver/pkg/admission/plugin/resourcequota
    
    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 applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIN
    
func LoadConfiguration(config io.Reader) (*resourcequotaapi.Configuration, error) {
	// if no config is provided, return a default configuration
	if config == nil {
		externalConfig := &resourcequotav1.Configuration{}
		scheme.Default(externalConfig)
		internalConfig := &resourcequotaapi.Configuration{}
		if err := scheme.Convert(externalConfig, internalConfig, nil); err != nil {
			return nil, err
		}
		return internalConfig, nil
	}
	// we have a config so parse it.
	data, err := io.ReadAll(config)
	if err != nil {
		return nil, err
	}
	decoder := codecs.UniversalDecoder()
	decodedObj, err := runtime.Decode(decoder, data)
	if err != nil {
		return nil, err
	}
	resourceQuotaConfiguration, ok := decodedObj.(*resourcequotaapi.Configuration)
	if !ok {
		return nil, fmt.Errorf("unexpected type: %T", decodedObj)
	}
	return resourceQuotaConfiguration, nil
}