resolving deprecated private service injection on commands classes

Controller/CustomFieldsGroupController.php

@@ -2,6 +2,7 @@
 
 namespace Chill\CustomFieldsBundle\Controller;
 
+use Chill\CustomFieldsBundle\Service\CustomFieldProvider;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
@@ -24,7 +25,22 @@ use Chill\CustomFieldsBundle\Form\Type\CustomFieldType as FormTypeCustomField;
  */
 class CustomFieldsGroupController extends Controller
 {
-
+    
+    /**
+     * @var CustomFieldProvider
+     */
+    private $customfieldProvider;
+    
+    /**
+     * CustomFieldsGroupController constructor.
+     *
+     * @param CustomFieldProvider $customFieldProvider
+     */
+    public function __construct(CustomFieldProvider $customFieldProvider)
+    {
+        $this->customfieldProvider = $customFieldProvider;
+    }
+    
     /**
      * Lists all CustomFieldsGroup entities.
      *
@@ -243,7 +259,7 @@ class CustomFieldsGroupController extends Controller
     {
 
         $fieldChoices = array();
-        foreach ($this->get('chill.custom_field.provider')->getAllFields()
+        foreach ($this->customfieldProvider->getAllFields()
               as $key => $customType) {
             $fieldChoices[$key] = $customType->getName();
         }