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: feature.go
    path of file: ./repos/rancher/pkg/features
    
    the code of the file until where you have to start completion: package features

import (
	"fmt"
	"strconv"
	"strings"

	v3 "github.com/rancher/rancher/pkg/apis/management.cattle.io/v3"
	managementv3 "github.com/rancher/rancher/pkg/generated/controllers/management.cattle.io/v3"
	"github.com/sirupsen/logrus"
	"k8s.io/apimachinery/pkg/api/errors"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

var (
	features = make(map[string]*Feature)

	// Features, ex.: ClusterRandomName = newFeature("cluster-randomizer", "Randomizes clusters.", false, false)

	UnsupportedStorageDrivers = newFeature(
		"unsupported-storage-drivers",
		"Allows the use of types for storage providers and provisioners that 
    
func applyArgumentDefaults(featureArgs string) error {
	if featureArgs == "" {
		return nil
	}

	formattingError := fmt.Errorf("feature argument [%s] should be of the form \"features=feature1=bool,feature2=bool\"", featureArgs)
	args := strings.Split(featureArgs, ",")

	applyFeatureDefaults := make(map[string]bool)

	for _, feature := range args {
		featureSet := strings.Split(feature, "=")
		if len(featureSet) != 2 {
			return formattingError
		}

		key := featureSet[0]
		if features[key] == nil {
			return fmt.Errorf("\"%s\" is not a valid feature", key)
		}

		value, err := strconv.ParseBool(featureSet[1])
		if err != nil {
			return formattingError
		}

		applyFeatureDefaults[key] = value
	}

	// only want to apply defaults once all args have been parsed and validated
	for k, v := range applyFeatureDefaults {
		features[k].def = v
		features[k].val = v
	}

	return nil
}