mutators      migrateMutators
		input         []any
		expected      []any
		expectedDiff  bool
		expectedError bool
	}{
		{
			name:     "mutate InitConfiguration",
			mutators: defaultMigrateMutators(),
			input: []any{&kubeadmapi.InitConfiguration{
				ClusterConfiguration: kubeadmapi.ClusterConfiguration{
					APIServer: kubeadmapi.APIServer{
						TimeoutForControlPlane: &metav1.Duration{

// Only kubeadm kinds are migrated.
func MigrateOldConfig(oldConfig []byte, allowExperimental bool, mutators migrateMutators) ([]byte, error) {
	newConfig := [][]byte{}

	if mutators == nil {
		mutators = defaultMigrateMutators()
	}

	gvkmap, err := kubeadmutil.SplitYAMLDocuments(oldConfig)
	if err != nil {
		return []byte{}, err
	}

	gvks := []schema.GroupVersionKind{}
	for gvk := range gvkmap {