backpack crudcontroller helper

WaveCrudController.php

<?php
namespace App\Http\Controllers\Admin;

use Backpack\CRUD\app\Http\Controllers\CrudController;

// VALIDATION: change the requests to match your own file names if you need form validation
use App\Http\Requests\WaveResourceRequest as StoreRequest;
use App\Http\Requests\WaveResourceRequest as UpdateRequest;

class WaveCrudController extends CrudController
{

    public function addBothField($arr, $blnListHide=0)
    {
        $arrColumns=$arr;
        $arrColumns["type"]=str_replace("select2_multiple","select_multiple",$arrColumns["type"]);
        if (!$blnListHide)$this->crud->addColumn($arrColumns);
        $this->crud->addField($arr );
    }

    public function addBothSelectField($arr, $blnListHide=0)
    {
       $model = $arr["model"];
        $this->addBothField( ['label' => ucfirst($model),
            'type' => 'select',
            'name' => strtolower($model) . '_id',
            'entity' =>   strtolower($model)  ,
            'attribute' => 'name',
            'model' => "App\Models\Wave" . ucfirst($model)]
            ,$blnListHide);
    }
    public function addSelectFilter($field, $class, $name)
    {
        $model="\\App\\Models\\" . $class;
        $values =  $model::all()->pluck('name', 'id')->toArray();
        $this->crud->addFilter([ // select2 filter
            'name' => $field,
            'type' => 'select2',
            'label'=>  $name
       ], $values
//            , function($value) { // if the filter is active$this->crud->addClause('where', $filter->name, $value);}
        );
    }

}