PHP: Yii2 Kartik editable dropdown w/filtering

gistfile1.txt

 // appt type dropdown editable column
    [
            'class' => 'kartik\grid\EditableColumn',
            'attribute' => 'appt_typeID',
            'pageSummary' => true,
            'width' => '100px',
            // filtering grid
            'filterType'=>GridView::FILTER_SELECT2,
            'filter'=>ArrayHelper::map(ApptType::find()->orderBy('ID')->asArray()->all(),'ID', 'appt_abbr'), 
            'filterWidgetOptions'=>[
                'pluginOptions'=>['allowClear'=>true],
            ],
            'filterInputOptions'=>['placeholder'=>'- Type -'],
            // end filtering grid
            'editableOptions'=> function ($model, $key, $index, $widget) {
                $appttypes = ArrayHelper::map(ApptType::find()->orderBy('ID')->asArray()->all(),'ID','appt_abbr');
                    return [
                            'header' => 'Appt Type',
                            'attribute' => 'appt_typeID',
                            'size' => 'sm',
                            'inputType' => Editable::INPUT_DROPDOWN_LIST,
                            'displayValueConfig' => $appttypes,
                            'data' => $appttypes,
                           //'formOptions'=> ['action' => ['/appt/editappt']] // point to new action
                    ];
            }
],