'seriesNumber' => [
        'attribute' => 'seriesNumber',
        'filter'    => Select2::widget([
          'model'         => $searchModel,
          'attribute'     => 'seriesNumber',
          'data'          => ArrayHelper::map(\common\models\Invoice::find()->where(['companyId' => Yii::$app->user->identity->currentCompanyId])->andWhere(['records' => ($records == 'acquisitions') ?'2' :'1'])->all(), 'seriesNumber', 'seriesNumber'),
          'options'       => ['placeholder' => 'Select series no'],
          'pluginOptions' => [
            'allowClear' => TRUE
          ],
        ])
      ],